[Automake-commit] [SCM] GNU Automake branch, maint, updated. v1.13.2-150

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[Automake-commit] [SCM] GNU Automake branch, maint, updated. v1.13.2-150

From:	Stefano Lattarini
Subject:	[Automake-commit] [SCM] GNU Automake branch, maint, updated. v1.13.2-150-g478740d
Date:	Sat, 18 May 2013 22:18:45 +0000
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http://git.sv.gnu.org/gitweb/?p=automake.git;a=commitdiff;h=478740deb00d19000ddbcd8a21789f1d65bd2c54

The branch, maint has been updated
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- Log -----------------------------------------------------------------
commit 478740deb00d19000ddbcd8a21789f1d65bd2c54
Author: Stefano Lattarini <address@hidden>
Date:   Sun May 19 00:09:30 2013 +0200

    tests: fix a spurious failure with FreeBSD make
    
    Failures due to known VPATH support issues in that make implementation
    (the same issues that have been causing the long-standing bug#7884).
    
    * t/lex-multiple.sh: Adjust.
    
    Signed-off-by: Stefano Lattarini <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 HACKING                                            |    2 -
 NEWS                                               |    9 +++++++
 PLANS/subdir-objects.txt                           |   18 +++++---------
 gen-testsuite-part                                 |    4 +-
 lib/am/lisp.am                                     |    4 +-
 maintainer/syntax-checks.mk                        |   14 -----------
 t/Makefile.inc                                     |   14 ++---------
 t/README                                           |    6 ++--
 t/aclocal-macrodir.tap                             |    2 +-
 t/aclocal-macrodirs.tap                            |    2 +-
 t/auxdir-autodetect.sh                             |    2 +-
 t/ax/am-test-lib.sh                                |   10 +-------
 t/ax/deltree.pl                                    |   19 +++++++++++++++
 t/ax/test-defs.in                                  |    8 +++---
 t/ax/test-lib.sh                                   |   24 +++++++++++++++----
 t/check-tests-in-builddir.sh                       |    2 +-
 t/dist-formats.tap                                 |    2 +-
 t/distcheck-configure-flags-am.sh                  |    2 +-
 t/distcheck-configure-flags.sh                     |    2 +-
 t/java-empty-classpath.sh                          |    4 +-
 t/javaflags.sh                                     |    2 +-
 t/lex-multiple.sh                                  |    2 +-
 t/lflags.sh                                        |    2 +-
 t/lflags2.sh                                       |    2 +-
 t/lisp-flags.sh                                    |    2 +-
 t/lisp6.sh                                         |    2 +-
 t/missing-auxfile-stops-makefiles-creation.sh      |    2 +-
 t/parallel-am.sh                                   |    2 +-
 t/parallel-am2.sh                                  |    2 +-
 t/parallel-am3.sh                                  |    2 +-
 t/parallel-tests-log-override-recheck.sh           |    2 +-
 t/pkg-config-macros.sh                             |    2 +-
 t/python-missing.sh                                |    2 +-
 t/python-too-old.sh                                |    2 +-
 t/python11.sh                                      |    2 +-
 t/remake-deeply-nested.sh                          |    2 +-
 t/self-check-dir.tap                               |    2 +-
 t/self-check-report.sh                             |    2 +-
 t/self-check-seq.tap                               |    2 +-
 t/silent-configsite.sh                             |    2 +-
 t/suffix6c.sh                                      |    2 +-
 t/tar-override.sh                                  |    2 +-
 t/tests-environment-and-log-compiler.sh            |    2 +-
 t/vala-configure.sh                                |    2 +-
 t/werror3.sh                                       |    2 +-
 t/yflags-cmdline-override.sh                       |    2 +-
 t/yflags.sh                                        |    2 +-
 t/yflags2.sh                                       |    2 +-
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diff --git a/HACKING b/HACKING
index 435eb77..fac35be 100644
--- a/HACKING
+++ b/HACKING
@@ -276,8 +276,6 @@
 
 * Use "make check" and "make maintainer-check" liberally.
 
-* Make sure each test file is executable.
-
 * Export the 'keep_testdirs' environment variable to "yes" to keep
   test directories for successful tests also.
 
diff --git a/NEWS b/NEWS
index e53c3f8..16790b2 100644
--- a/NEWS
+++ b/NEWS
@@ -161,6 +161,15 @@ New in 1.14:
 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+New in 1.13.3:
+
+* Bugs fixed:
+
+  - Byte-compilation of Emacs lisp files could fail spuriously on Solaris,
+    when /bin/ksh or /usr/xpg4/bin/sh were used as shell.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
 New in 1.13.2:
 
 * Documentation fixes:
diff --git a/PLANS/subdir-objects.txt b/PLANS/subdir-objects.txt
index 8647403..94c6305 100644
--- a/PLANS/subdir-objects.txt
+++ b/PLANS/subdir-objects.txt
@@ -3,7 +3,7 @@ Summary
 
 We want to make the behaviour currently enabled by the 'subdir-objects'
 the default one, and in fact the *only* one, in Automake 2.0.
-See automake bug#13378: <http://debbugs.gnu.org/13351>.
+See automake bug#13378: <http://debbugs.gnu.org/13378>.
 
 Details
 -------
@@ -38,29 +38,25 @@ C compilation rules mistakenly passed the "-c -o" options 
combination
 unconditionally (even to losing compiler) when the 'subdir-objects' was
 used but sources were only present in the top-level directory.
 
-TODO for automake 1.14
+DONE for automake 1.14
 ----------------------
 
-Give a warning in the category 'unsupported' if the 'subdir-objects'
+We give a warning in the category 'unsupported' if the 'subdir-objects'
 option is not specified.  This should give the users enough forewarning
 about the planned change, and give them time to update their packages
 to the new semantic.
 
-Be sure to avoid the warning when it would be irrelevant, i.e., if all
-source files sit in "current" directory (thanks to Peter Johansson for
-suggesting this).
+We also make sure to avoid the warning when it would be irrelevant, i.e.,
+if all source files sit in "current" directory (thanks to Peter Johansson
+for suggesting this).
 
 For automake 2.0
 ----------------
 
-Remove the copy & paste of Autoconf internals in our AC_PROG_CC rewrite
-See the first patch in the series:
-<http://lists.gnu.org/archive/html/automake-patches/2013-01/msg00102.html>
-
 Make the behaviour once activated by the 'subdir-object' option mandatory.
 With that change, we'll drop support for the "old" behaviour of having
 object files derived from sources in a subdirectory being placed in the
 current directory rather than in that same subdirectory.
 
-Still keep the 'subdir-object' option supported (as a simple no-op
+Still keep the 'subdir-objects' option supported (as a simple no-op
 now), to save useless churn in our user's build systems.
diff --git a/gen-testsuite-part b/gen-testsuite-part
index 93d63aa..4584d2b 100755
--- a/gen-testsuite-part
+++ b/gen-testsuite-part
@@ -313,7 +313,7 @@ while (my ($wrapped_test, $setup_list) = each 
%wrapper_setups)
         atomic_write $wrapper_test,
                      sub { write_wrapper_script $_[0], $wrapped_test,
                                                 $setup },
-                     0555;
+                     0444;
         # The generated test works by sourcing the original test, so that
         # it has to be re-run every time that changes ...
         print "$wbase.log: $wrapped_test\n";
@@ -391,7 +391,7 @@ foreach my $lt (TRUE, FALSE)
               exit \$?
 EOF
           },
-          0555);
+          0444);
       }
    }
 
diff --git a/lib/am/lisp.am b/lib/am/lisp.am
index de9e5bb..bfb023f 100644
--- a/lib/am/lisp.am
+++ b/lib/am/lisp.am
@@ -31,13 +31,13 @@ endif %?INSTALL%
 ## input (which would erronously put it in $(srcdir) in VPATH builds),
 ## so we override that, too.
        if test "$(EMACS)" != "no"; then \
-         am__subdir_includes=''; \
+         am__dir=. am__subdir_includes=''; \
          case $@ in */*) \
            am__dir=`echo '$@' | sed 's,/[^/]*$$,,'`; \
            am__subdir_includes="-L $$am__dir -L $(srcdir)/$$am__dir"; \
          esac; \
 ## Emacs byte-compilation won't create this automatically, sadly.
-         test -d $$am__dir || $(MKDIR_P) $$am__dir || exit 1; \
+         test -d "$$am__dir" || $(MKDIR_P) "$$am__dir" || exit 1; \
          $(EMACS) --batch \
            $(AM_ELCFLAGS) $(ELCFLAGS) \
            $$am__subdir_includes -L $(builddir) -L $(srcdir) \
diff --git a/maintainer/syntax-checks.mk b/maintainer/syntax-checks.mk
index 76670ea..5e1d71e 100644
--- a/maintainer/syntax-checks.mk
+++ b/maintainer/syntax-checks.mk
@@ -68,7 +68,6 @@ sc_tests_required_after_defs \
 sc_tests_overriding_macros_on_cmdline \
 sc_tests_plain_sleep \
 sc_tests_ls_t \
-sc_tests_executable \
 sc_m4_am_plain_egrep_fgrep \
 sc_tests_no_configure_in \
 sc_tests_PATH_SEPARATOR \
@@ -409,19 +408,6 @@ sc_tests_ls_t:
          exit 1; \
        fi
 
-## Test scripts must be executable.
-sc_tests_executable:
-       @st=0; \
-       for f in $(xtests); do \
-         case $$f in \
-           t/ax/*|./t/ax/*|$(srcdir)/t/ax/*);; \
-           *) test -x $$f || { echo "$$f: not executable" >&2; st=1; }; \
-         esac; \
-       done; \
-       test $$st -eq 0 || echo '$@: some test scripts are not executable' >&2; 
\
-       exit $$st;
-
-
 ## Never use 'sleep 1' to create files with different timestamps.
 ## Use '$sleep' instead.  Some filesystems (e.g., Windows) have only
 ## a 2sec resolution.
diff --git a/t/Makefile.inc b/t/Makefile.inc
index f979c66..3634a4b 100644
--- a/t/Makefile.inc
+++ b/t/Makefile.inc
@@ -32,7 +32,8 @@ TAP_LOG_DRIVER = AM_TAP_AWK='$(AWK)' $(SHELL) 
$(srcdir)/lib/tap-driver.sh
 
 AM_TAP_LOG_DRIVER_FLAGS = --merge
 
-EXTRA_DIST += %D%/README %D%/ax/is %D%/ax/is_newest
+EXTRA_DIST += %D%/README %D%/ax/is %D%/ax/is_newest %D%/ax/deltree.pl
+ 
 
 ## Will be updated later.
 TESTS =
@@ -260,15 +261,6 @@ EXTRA_DIST += $(perf_TESTS)
 clean-local: clean-local-check
 .PHONY: clean-local-check
 clean-local-check:
-## Directories candidate to be test directories match this wildcard.
-       @globs='%D%/*.dir %D%/*/*.dir */%D%/*.dir */%D%/*/*.dir'; \
-## The 'nullglob' bash option is not portable, so use perl.
-       dirs=`$(PERL) -e "print join(' ', glob('$$globs'));"` || exit 1; \
-       if test -n "$$dirs"; then \
-## Errors in find are acceptable, errors in rm are not.
-           find $$dirs -type d ! -perm -700 -exec chmod u+rwx {} ';'; \
-           echo " rm -rf $$dirs"; \
-           rm -rf $$dirs || exit 1; \
-       fi
+       $(AM_V_GEN)$(PERL) $(srcdir)/t/ax/deltree.pl t/*.dir t/*/*.dir */t/*.dir
 
 # vim: ft=automake noet
diff --git a/t/README b/t/README
index 02cb3a5..60eb7c7 100644
--- a/t/README
+++ b/t/README
@@ -254,9 +254,9 @@ Writing test cases
   by a C++ compiler, for similar reasons (i.e., the isatty(3) function
   from that same unistd.h header would be required otherwise).
 
-* Before commit: make sure the test is executable, add the tests to
-  TESTS in Makefile.am, add it to XFAIL_TESTS in addition if needed,
-  write a ChangeLog entry, send the diff to <address@hidden>.
+* Add any new test to handwritten_TESTS in 't/list-of-tests.mk', and
+  to XFAIL_TESTS in addition if needed (that is, if the test is expected
+  to fail).
 
 * In test scripts, prefer using POSIX constructs over their old
   Bourne-only equivalents:
diff --git a/t/ac-output-old.tap b/t/ac-output-old.tap
old mode 100755
new mode 100644
diff --git a/t/aclocal-I-and-install.sh b/t/aclocal-I-and-install.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-I-order-1.sh b/t/aclocal-I-order-1.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-I-order-2.sh b/t/aclocal-I-order-2.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-I-order-3.sh b/t/aclocal-I-order-3.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-acdir.sh b/t/aclocal-acdir.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-amflags.sh b/t/aclocal-amflags.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-autoconf-version-check.sh 
b/t/aclocal-autoconf-version-check.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-comments-respected.sh b/t/aclocal-comments-respected.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-deleted-header-aclocal-amflags.sh 
b/t/aclocal-deleted-header-aclocal-amflags.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-deleted-header.sh b/t/aclocal-deleted-header.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-deps-subdir.sh b/t/aclocal-deps-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-deps.sh b/t/aclocal-deps.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-dirlist-abspath.sh b/t/aclocal-dirlist-abspath.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-dirlist-globbing.sh b/t/aclocal-dirlist-globbing.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-dirlist.sh b/t/aclocal-dirlist.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-install-absdir.sh b/t/aclocal-install-absdir.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-install-fail.sh b/t/aclocal-install-fail.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-install-mkdir.sh b/t/aclocal-install-mkdir.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-m4-include-are-scanned-aclocal-amflags.sh 
b/t/aclocal-m4-include-are-scanned-aclocal-amflags.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-m4-include-are-scanned.sh 
b/t/aclocal-m4-include-are-scanned.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-m4-sinclude.sh b/t/aclocal-m4-sinclude.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-macrodir.tap b/t/aclocal-macrodir.tap
old mode 100755
new mode 100644
index fb80609..4d11917
--- a/t/aclocal-macrodir.tap
+++ b/t/aclocal-macrodir.tap
@@ -23,7 +23,7 @@ am_create_testdir=empty
 plan_ 7
 
 ocwd=$(pwd) || fatal_ "getting current working directory"
-ACLOCAL_PATH=; unset ACLOCAL_PATH
+unset ACLOCAL_PATH
 
 #
 # General utility functions and variables.
diff --git a/t/aclocal-macrodirs.tap b/t/aclocal-macrodirs.tap
old mode 100755
new mode 100644
index 0898c29..1cbf6d7
--- a/t/aclocal-macrodirs.tap
+++ b/t/aclocal-macrodirs.tap
@@ -23,7 +23,7 @@ am_create_testdir=empty
 plan_ 15
 
 ocwd=$(pwd) || fatal_ "getting current working directory"
-ACLOCAL_PATH=; unset ACLOCAL_PATH
+unset ACLOCAL_PATH
 
 #
 # General utility functions and variables.
diff --git a/t/aclocal-missing-macros.sh b/t/aclocal-missing-macros.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-no-extra-scan.sh b/t/aclocal-no-extra-scan.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-no-force.sh b/t/aclocal-no-force.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-no-install-no-mkdir.sh b/t/aclocal-no-install-no-mkdir.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-no-symlinked-overwrite.sh 
b/t/aclocal-no-symlinked-overwrite.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-no-unused-required.sh b/t/aclocal-no-unused-required.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-path-install-serial.sh b/t/aclocal-path-install-serial.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-path-install.sh b/t/aclocal-path-install.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-path-nonexistent.sh b/t/aclocal-path-nonexistent.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-path-precedence.sh b/t/aclocal-path-precedence.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-path.sh b/t/aclocal-path.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-pr450.sh b/t/aclocal-pr450.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-print-acdir.sh b/t/aclocal-print-acdir.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-remake-misc.sh b/t/aclocal-remake-misc.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-req.sh b/t/aclocal-req.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-scan-configure-ac-pr319.sh 
b/t/aclocal-scan-configure-ac-pr319.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-serial.sh b/t/aclocal-serial.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-underquoted-defun.sh b/t/aclocal-underquoted-defun.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal-verbose-install.sh b/t/aclocal-verbose-install.sh
old mode 100755
new mode 100644
diff --git a/t/aclocal.sh b/t/aclocal.sh
old mode 100755
new mode 100644
diff --git a/t/acsilent.sh b/t/acsilent.sh
old mode 100755
new mode 100644
diff --git a/t/acsubst.sh b/t/acsubst.sh
old mode 100755
new mode 100644
diff --git a/t/acsubst2.sh b/t/acsubst2.sh
old mode 100755
new mode 100644
diff --git a/t/add-missing-multiple.sh b/t/add-missing-multiple.sh
old mode 100755
new mode 100644
diff --git a/t/add-missing.tap b/t/add-missing.tap
old mode 100755
new mode 100644
diff --git a/t/all.sh b/t/all.sh
old mode 100755
new mode 100644
diff --git a/t/all2.sh b/t/all2.sh
old mode 100755
new mode 100644
diff --git a/t/alloca.sh b/t/alloca.sh
old mode 100755
new mode 100644
diff --git a/t/alloca2.sh b/t/alloca2.sh
old mode 100755
new mode 100644
diff --git a/t/alpha.sh b/t/alpha.sh
old mode 100755
new mode 100644
diff --git a/t/alpha2.sh b/t/alpha2.sh
old mode 100755
new mode 100644
diff --git a/t/am-config-header.sh b/t/am-config-header.sh
old mode 100755
new mode 100644
diff --git a/t/am-default-source-ext.sh b/t/am-default-source-ext.sh
old mode 100755
new mode 100644
diff --git a/t/am-macro-not-found.sh b/t/am-macro-not-found.sh
old mode 100755
new mode 100644
diff --git a/t/am-missing-prog.sh b/t/am-missing-prog.sh
old mode 100755
new mode 100644
diff --git a/t/am-prog-cc-c-o.sh b/t/am-prog-cc-c-o.sh
old mode 100755
new mode 100644
diff --git a/t/am-prog-cc-stdc.sh b/t/am-prog-cc-stdc.sh
old mode 100755
new mode 100644
diff --git a/t/am-tests-environment.sh b/t/am-tests-environment.sh
old mode 100755
new mode 100644
diff --git a/t/amassign.sh b/t/amassign.sh
old mode 100755
new mode 100644
diff --git a/t/amhello-binpkg.sh b/t/amhello-binpkg.sh
old mode 100755
new mode 100644
diff --git a/t/amhello-cflags.sh b/t/amhello-cflags.sh
old mode 100755
new mode 100644
diff --git a/t/amhello-cross-compile.sh b/t/amhello-cross-compile.sh
old mode 100755
new mode 100644
diff --git a/t/aminit-moreargs-deprecation.sh b/t/aminit-moreargs-deprecation.sh
old mode 100755
new mode 100644
diff --git a/t/amopt.sh b/t/amopt.sh
old mode 100755
new mode 100644
diff --git a/t/amopts-location.sh b/t/amopts-location.sh
old mode 100755
new mode 100644
diff --git a/t/amopts-variable-expansion.sh b/t/amopts-variable-expansion.sh
old mode 100755
new mode 100644
diff --git a/t/amsubst.sh b/t/amsubst.sh
old mode 100755
new mode 100644
diff --git a/t/ansi2knr-no-more.sh b/t/ansi2knr-no-more.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib.sh b/t/ar-lib.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib2.sh b/t/ar-lib2.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib3.sh b/t/ar-lib3.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib4.sh b/t/ar-lib4.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib5a.sh b/t/ar-lib5a.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib5b.sh b/t/ar-lib5b.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib6a.sh b/t/ar-lib6a.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib6b.sh b/t/ar-lib6b.sh
old mode 100755
new mode 100644
diff --git a/t/ar-lib7.sh b/t/ar-lib7.sh
old mode 100755
new mode 100644
diff --git a/t/ar.sh b/t/ar.sh
old mode 100755
new mode 100644
diff --git a/t/ar2.sh b/t/ar2.sh
old mode 100755
new mode 100644
diff --git a/t/ar3.sh b/t/ar3.sh
old mode 100755
new mode 100644
diff --git a/t/ar4.sh b/t/ar4.sh
old mode 100755
new mode 100644
diff --git a/t/ar5.sh b/t/ar5.sh
old mode 100755
new mode 100644
diff --git a/t/asm.sh b/t/asm.sh
old mode 100755
new mode 100644
diff --git a/t/asm2.sh b/t/asm2.sh
old mode 100755
new mode 100644
diff --git a/t/asm3.sh b/t/asm3.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-acconfig-no-subdir.sh b/t/autodist-acconfig-no-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-acconfig.sh b/t/autodist-acconfig.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-aclocal-m4.sh b/t/autodist-aclocal-m4.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-config-headers.sh b/t/autodist-config-headers.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-configure-no-subdir.sh 
b/t/autodist-configure-no-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-no-duplicate.sh b/t/autodist-no-duplicate.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-stamp-vti.sh b/t/autodist-stamp-vti.sh
old mode 100755
new mode 100644
diff --git a/t/autodist-subdir.sh b/t/autodist-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/autodist.sh b/t/autodist.sh
old mode 100755
new mode 100644
diff --git a/t/autohdr-subdir-pr12495.sh b/t/autohdr-subdir-pr12495.sh
old mode 100755
new mode 100644
diff --git a/t/autohdr.sh b/t/autohdr.sh
old mode 100755
new mode 100644
diff --git a/t/autohdr3.sh b/t/autohdr3.sh
old mode 100755
new mode 100644
diff --git a/t/autohdr4.sh b/t/autohdr4.sh
old mode 100755
new mode 100644
diff --git a/t/autohdrdry.sh b/t/autohdrdry.sh
old mode 100755
new mode 100644
diff --git a/t/automake-cmdline.tap b/t/automake-cmdline.tap
old mode 100755
new mode 100644
diff --git a/t/auxdir-autodetect.sh b/t/auxdir-autodetect.sh
old mode 100755
new mode 100644
index 17567c0..457e06a
--- a/t/auxdir-autodetect.sh
+++ b/t/auxdir-autodetect.sh
@@ -21,7 +21,7 @@
 
 nil=__no_such_program
 
-unset NONESUCH || :
+unset NONESUCH
 
 cat >>configure.ac << END
 AM_MISSING_PROG([NONESUCH],[$nil])
diff --git a/t/auxdir-computed.tap b/t/auxdir-computed.tap
old mode 100755
new mode 100644
diff --git a/t/auxdir-misplaced.sh b/t/auxdir-misplaced.sh
old mode 100755
new mode 100644
diff --git a/t/auxdir-nonexistent.sh b/t/auxdir-nonexistent.sh
old mode 100755
new mode 100644
diff --git a/t/auxdir-unportable.tap b/t/auxdir-unportable.tap
old mode 100755
new mode 100644
diff --git a/t/auxdir.sh b/t/auxdir.sh
old mode 100755
new mode 100644
diff --git a/t/auxdir6.sh b/t/auxdir6.sh
old mode 100755
new mode 100644
diff --git a/t/auxdir7.sh b/t/auxdir7.sh
old mode 100755
new mode 100644
diff --git a/t/auxdir8.sh b/t/auxdir8.sh
old mode 100755
new mode 100644
diff --git a/t/ax/am-test-lib.sh b/t/ax/am-test-lib.sh
index 91a18cc..f35ccd5 100644
--- a/t/ax/am-test-lib.sh
+++ b/t/ax/am-test-lib.sh
@@ -34,11 +34,6 @@ distdir=$me-1.0
 ##  Environment cleanup.  ##
 ## ---------------------- ##
 
-# Temporarily disable this, since some shells (e.g., older version
-# of Bash) can return a non-zero exit status upon the when a non-set
-# variable is unset.
-set +e
-
 # Unset some make-related variables that may cause $MAKE to act like
 # a recursively invoked sub-make.  Any $MAKE invocation in a test is
 # conceptually an independent invocation, not part of the main
@@ -85,9 +80,6 @@ for pfx in TEST_ SH_ TAP_ ''; do
 done
 unset pfx
 
-# Re-enable, it had been temporarily disabled above.
-set -e
-
 # cross_compiling
 # ---------------
 # Tell whether we are cross-compiling.  This is especially useful to skip
@@ -805,7 +797,7 @@ process_requirements ()
       *" $am_tool"*) . ./t/$am_tool-macros.dir/get.sh;;
     esac
   done
-  am_tool=; unset am_tool
+  unset am_tool
 }
 
 ## ---------------------------------------------------------------- ##
diff --git a/t/ax/deltree.pl b/t/ax/deltree.pl
new file mode 100644
index 0000000..7060766
--- /dev/null
+++ b/t/ax/deltree.pl
@@ -0,0 +1,19 @@
+#!/usr/bin/env perl
+# deltree: recursively removes file and directory,
+# trying to handle permissions and other complications.
+
+use strict;
+use warnings FATAL => 'all';
+use File::Path qw/rmtree/;
+
+my $exit_status = 0;
+local $SIG{__WARN__} = sub { warn "@_"; $exit_status = 1; };
+
+foreach my $path (@ARGV) {
+  local $@ = undef;
+  rmtree ($path);
+}
+
+exit $exit_status;
+
+# vim: ft=perl ts=4 sw=4 et
diff --git a/t/ax/test-defs.in b/t/ax/test-defs.in
index 9662c79..c716cab 100644
--- a/t/ax/test-defs.in
+++ b/t/ax/test-defs.in
@@ -107,7 +107,7 @@ 
AUTORECONF=${AM_TESTSUITE_AUTORECONF-${AUTORECONF-'@am_AUTORECONF@'}}
 AUTOHEADER=${AM_TESTSUITE_AUTOHEADER-${AUTOHEADER-'@am_AUTOHEADER@'}}
 AUTOUPDATE=${AM_TESTSUITE_AUTOUPDATE-${AUTOUPDATE-'@am_AUTOUPDATE@'}}
 
-# Tests who want complete control over aclocal or automake command-line
+# Tests which want complete control over aclocal or automake command-line
 # options should use $am_original_ACLOCAL or $am_original_AUTOMAKE.  The
 # "test -z" tests take care not to re-initialize them if 'test-defs.sh'
 # is re-sourced, as we want that file to remain really idempotent.
@@ -118,9 +118,9 @@ if test -z "$am_original_ACLOCAL"; then
   am_original_ACLOCAL=${AM_TESTSUITE_ACLOCAL-${ACLOCAL-"aclocal-$APIVERSION"}}
 fi
 
-# Use -Werror because this also turns some Perl warnings into error.
-# Tests for which this is inappropriate should use -Wno-error.
-# Tests who want complete control over aclocal command-line options
+# Use -Werror by default.  Tests for which this is inappropriate should
+# use -Wno-error.
+# Tests which want complete control over aclocal command-line options
 # should use $am_original_ACLOCAL instead.
 ACLOCAL="$am_original_ACLOCAL -Werror"
 
diff --git a/t/ax/test-lib.sh b/t/ax/test-lib.sh
index a3c16ee..ee83dcf 100644
--- a/t/ax/test-lib.sh
+++ b/t/ax/test-lib.sh
@@ -92,7 +92,7 @@ _am_exit ()
   set +e
   # See comments in the exit trap for the reason we do this.
   test 77 = $1 && am__test_skipped=yes
-  # Spurious escaping to ensure we do not call our 'exit' alias.
+  # Extra escaping to ensure we do not call our 'exit' alias.
   (\exit $1); \exit $1
 }
 # Avoid interferences from the environment
@@ -101,6 +101,23 @@ am__test_skipped=no
 # just inside a function definition.  Weird, but real.
 alias exit=_am_exit
 
+# In some shells (e.g., Solaris 10 /bin/ksh, or NetBSD 5.1 /bin/sh),
+# "unset VAR" returns a non-zero exit status in case the VAR variable
+# is already unset.  This doesn't interact well with our usage of
+# "set -e" in the testsuite.  This function and the alias below help
+# to work around the issue.
+_am_unset ()
+{
+  for _am_v
+  do
+    # Extra escaping (here and below) to ensure we do not call our
+    # 'unset' alias.
+    eval ${_am_v}=dummy && \unset ${_am_v} || exit 1
+  done
+  \unset _am_v
+}
+alias unset=_am_unset
+
 ## ------------------------------------ ##
 ##  General testsuite shell functions.  ##
 ## ------------------------------------ ##
@@ -174,10 +191,7 @@ seq_ ()
 rm_rf_ ()
 {
   test $# -gt 0 || return 0
-  # Ignore failures in find, we are only interested in failures of the
-  # final rm.
-  find "$@" -type d ! -perm -700 -exec chmod u+rwx {} \; || :
-  rm -rf "$@"
+  $PERL "$am_testaux_srcdir"/deltree.pl "$@"
 }
 
 commented_sed_unindent_prog='
diff --git a/t/backcompat-acout.sh b/t/backcompat-acout.sh
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old mode 100755
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old mode 100755
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diff --git a/t/check-fd-redirect.sh b/t/check-fd-redirect.sh
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diff --git a/t/check-no-test-driver.sh b/t/check-no-test-driver.sh
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diff --git a/t/check-subst-prog.sh b/t/check-subst-prog.sh
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diff --git a/t/check-tests-in-builddir.sh b/t/check-tests-in-builddir.sh
old mode 100755
new mode 100644
index fad6527..1c41368
--- a/t/check-tests-in-builddir.sh
+++ b/t/check-tests-in-builddir.sh
@@ -35,7 +35,7 @@ exit ${FOO_EXIT_STATUS-0}
 END
 chmod a+x foo.test
 
-unset FOO_EXIT_STATUS || :
+unset FOO_EXIT_STATUS
 
 $ACLOCAL
 $AUTOCONF
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diff --git a/t/dist-auxfile-2.sh b/t/dist-auxfile-2.sh
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diff --git a/t/dist-formats.tap b/t/dist-formats.tap
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index bebac37..49281d9
--- a/t/dist-formats.tap
+++ b/t/dist-formats.tap
@@ -28,7 +28,7 @@ plan_ 66
 
 ocwd=$(pwd) || fatal_ "getting current working directory"
 
-TAR='' && unset TAR
+unset TAR
 
 # Create common aclocal.m4 file, for later tests.
 mkdir setup \
diff --git a/t/dist-included-parent-dir.sh b/t/dist-included-parent-dir.sh
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diff --git a/t/distcheck-configure-flags-am.sh 
b/t/distcheck-configure-flags-am.sh
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new mode 100644
index f38b1dc..b1fd49b
--- a/t/distcheck-configure-flags-am.sh
+++ b/t/distcheck-configure-flags-am.sh
@@ -27,7 +27,7 @@ AS_IF([test $success = yes && test "$sentence" = 'it works 
:-)'],
 AC_OUTPUT
 END
 
-unset sentence || :
+unset sentence
 
 cat > Makefile.am << 'END'
 AM_DISTCHECK_CONFIGURE_FLAGS = $(dc_flags1) $(dc_flags2)
diff --git a/t/distcheck-configure-flags-subpkg.sh 
b/t/distcheck-configure-flags-subpkg.sh
old mode 100755
new mode 100644
diff --git a/t/distcheck-configure-flags.sh b/t/distcheck-configure-flags.sh
old mode 100755
new mode 100644
index b1725f2..3c23117
--- a/t/distcheck-configure-flags.sh
+++ b/t/distcheck-configure-flags.sh
@@ -26,7 +26,7 @@ AS_IF([test $success = yes && test "$sentence" = 'it works 
:-)'],
 AC_OUTPUT
 END
 
-unset sentence || :
+unset sentence
 
 : > Makefile.am
 
diff --git a/t/distcheck-hook.sh b/t/distcheck-hook.sh
old mode 100755
new mode 100644
diff --git a/t/distcheck-hook2.sh b/t/distcheck-hook2.sh
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b/t/doc-parsing-buglets-colneq-subst.sh
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diff --git a/t/flibs.sh b/t/flibs.sh
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diff --git a/t/fn99.sh b/t/fn99.sh
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diff --git a/t/fn99subdir.sh b/t/fn99subdir.sh
old mode 100755
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diff --git a/t/fnoc.sh b/t/fnoc.sh
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old mode 100755
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diff --git a/t/forcemiss2.sh b/t/forcemiss2.sh
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diff --git a/t/fort1.sh b/t/fort1.sh
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old mode 100755
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diff --git a/t/fortdep.sh b/t/fortdep.sh
old mode 100755
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diff --git a/t/gcj.sh b/t/gcj.sh
old mode 100755
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old mode 100755
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old mode 100755
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old mode 100755
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diff --git a/t/gcj6.sh b/t/gcj6.sh
old mode 100755
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diff --git a/t/get-sysconf.sh b/t/get-sysconf.sh
old mode 100755
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diff --git a/t/gettext-macros.sh b/t/gettext-macros.sh
old mode 100755
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diff --git a/t/gettext.sh b/t/gettext.sh
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diff --git a/t/gettext2.sh b/t/gettext2.sh
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diff --git a/t/gnits.sh b/t/gnits.sh
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diff --git a/t/gnuwarn.sh b/t/gnuwarn.sh
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diff --git a/t/hdr-vars-defined-once.sh b/t/hdr-vars-defined-once.sh
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diff --git a/t/help-depend.sh b/t/help-depend.sh
old mode 100755
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diff --git a/t/help-depend2.sh b/t/help-depend2.sh
old mode 100755
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diff --git a/t/help-dmalloc.sh b/t/help-dmalloc.sh
old mode 100755
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diff --git a/t/help-init.sh b/t/help-init.sh
old mode 100755
new mode 100644
diff --git a/t/help-lispdir.sh b/t/help-lispdir.sh
old mode 100755
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diff --git a/t/help-python.sh b/t/help-python.sh
old mode 100755
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diff --git a/t/help-silent.sh b/t/help-silent.sh
old mode 100755
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diff --git a/t/help-upc.sh b/t/help-upc.sh
old mode 100755
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diff --git a/t/hfs.sh b/t/hfs.sh
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diff --git a/t/insh2.sh b/t/insh2.sh
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diff --git a/t/install-info-dir.sh b/t/install-info-dir.sh
old mode 100755
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diff --git a/t/install2.sh b/t/install2.sh
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diff --git a/t/installdir.sh b/t/installdir.sh
old mode 100755
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diff --git a/t/instdat.sh b/t/instdat.sh
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diff --git a/t/instdat2.sh b/t/instdat2.sh
old mode 100755
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diff --git a/t/instdir-cond.sh b/t/instdir-cond.sh
old mode 100755
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diff --git a/t/instdir-cond2.sh b/t/instdir-cond2.sh
old mode 100755
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diff --git a/t/instdir-java.sh b/t/instdir-java.sh
old mode 100755
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diff --git a/t/instdir-lisp.sh b/t/instdir-lisp.sh
old mode 100755
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diff --git a/t/instdir-ltlib.sh b/t/instdir-ltlib.sh
old mode 100755
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diff --git a/t/instdir-no-empty.sh b/t/instdir-no-empty.sh
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diff --git a/t/instdir-python.sh b/t/instdir-python.sh
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diff --git a/t/instdir-texi.sh b/t/instdir-texi.sh
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diff --git a/t/instdir2.sh b/t/instdir2.sh
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diff --git a/t/instexec.sh b/t/instexec.sh
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diff --git a/t/instfail-info.sh b/t/instfail-info.sh
old mode 100755
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diff --git a/t/instfail-java.sh b/t/instfail-java.sh
old mode 100755
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diff --git a/t/instfail-libtool.sh b/t/instfail-libtool.sh
old mode 100755
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diff --git a/t/instfail.sh b/t/instfail.sh
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diff --git a/t/insthook.sh b/t/insthook.sh
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diff --git a/t/instman2.sh b/t/instman2.sh
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diff --git a/t/instmany-mans.sh b/t/instmany-mans.sh
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diff --git a/t/instsh3.sh b/t/instsh3.sh
old mode 100755
new mode 100644
diff --git a/t/instspc.tap b/t/instspc.tap
old mode 100755
new mode 100644
diff --git a/t/interp.sh b/t/interp.sh
old mode 100755
new mode 100644
diff --git a/t/interp2.sh b/t/interp2.sh
old mode 100755
new mode 100644
diff --git a/t/java-check.sh b/t/java-check.sh
old mode 100755
new mode 100644
diff --git a/t/java-clean.sh b/t/java-clean.sh
old mode 100755
new mode 100644
diff --git a/t/java-compile-install.sh b/t/java-compile-install.sh
old mode 100755
new mode 100644
diff --git a/t/java-compile-run-flat.sh b/t/java-compile-run-flat.sh
old mode 100755
new mode 100644
diff --git a/t/java-compile-run-nested.sh b/t/java-compile-run-nested.sh
old mode 100755
new mode 100644
diff --git a/t/java-empty-classpath.sh b/t/java-empty-classpath.sh
old mode 100755
new mode 100644
index 387c4c3..cc3dae3
--- a/t/java-empty-classpath.sh
+++ b/t/java-empty-classpath.sh
@@ -74,7 +74,7 @@ $AUTOCONF
 $AUTOMAKE
 ./configure
 
-unset CLASSPATH || :
+unset CLASSPATH
 $MAKE
 $MAKE clean
 
@@ -82,7 +82,7 @@ CLASSPATH=''; export CLASSPATH
 $MAKE
 $MAKE clean
 
-unset CLASSPATH || :
+unset CLASSPATH
 $MAKE distcheck
 
 :
diff --git a/t/java-extra.sh b/t/java-extra.sh
old mode 100755
new mode 100644
diff --git a/t/java-mix.sh b/t/java-mix.sh
old mode 100755
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diff --git a/t/java-no-duplicate.sh b/t/java-no-duplicate.sh
old mode 100755
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diff --git a/t/java-nobase.sh b/t/java-nobase.sh
old mode 100755
new mode 100644
diff --git a/t/java-noinst.sh b/t/java-noinst.sh
old mode 100755
new mode 100644
diff --git a/t/java-rebuild.sh b/t/java-rebuild.sh
old mode 100755
new mode 100644
diff --git a/t/java-sources.sh b/t/java-sources.sh
old mode 100755
new mode 100644
diff --git a/t/java-uninstall.sh b/t/java-uninstall.sh
old mode 100755
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diff --git a/t/java.sh b/t/java.sh
old mode 100755
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diff --git a/t/java2.sh b/t/java2.sh
old mode 100755
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diff --git a/t/java3.sh b/t/java3.sh
old mode 100755
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diff --git a/t/javadir-undefined.sh b/t/javadir-undefined.sh
old mode 100755
new mode 100644
diff --git a/t/javaflags.sh b/t/javaflags.sh
old mode 100755
new mode 100644
index c1c2671..bb9ab26
--- a/t/javaflags.sh
+++ b/t/javaflags.sh
@@ -26,7 +26,7 @@ chmod a+x fake-javac
 
 # Remove JAVAC from the environment, so that it won't interfere
 # with 'make -e' below.
-unset JAVAC || :
+unset JAVAC
 
 cat >> configure.ac <<'END'
 AC_PROG_CC
diff --git a/t/javaprim.sh b/t/javaprim.sh
old mode 100755
new mode 100644
diff --git a/t/javasubst.sh b/t/javasubst.sh
old mode 100755
new mode 100644
diff --git a/t/ldadd.sh b/t/ldadd.sh
old mode 100755
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diff --git a/t/ldflags.sh b/t/ldflags.sh
old mode 100755
new mode 100644
diff --git a/t/lex-clean-cxx.sh b/t/lex-clean-cxx.sh
old mode 100755
new mode 100644
diff --git a/t/lex-clean.sh b/t/lex-clean.sh
old mode 100755
new mode 100644
diff --git a/t/lex-depend-cxx.sh b/t/lex-depend-cxx.sh
old mode 100755
new mode 100644
diff --git a/t/lex-depend-grep.sh b/t/lex-depend-grep.sh
old mode 100755
new mode 100644
diff --git a/t/lex-depend.sh b/t/lex-depend.sh
old mode 100755
new mode 100644
diff --git a/t/lex-header.sh b/t/lex-header.sh
old mode 100755
new mode 100644
diff --git a/t/lex-lib-external.sh b/t/lex-lib-external.sh
old mode 100755
new mode 100644
diff --git a/t/lex-lib.sh b/t/lex-lib.sh
old mode 100755
new mode 100644
diff --git a/t/lex-libobj.sh b/t/lex-libobj.sh
old mode 100755
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diff --git a/t/lex-line.sh b/t/lex-line.sh
old mode 100755
new mode 100644
diff --git a/t/lex-multiple.sh b/t/lex-multiple.sh
old mode 100755
new mode 100644
index 7383eaf..e804bb2
--- a/t/lex-multiple.sh
+++ b/t/lex-multiple.sh
@@ -102,6 +102,6 @@ if ! cross_compiling; then
   : For shells with busted 'set -e'.
 fi
 
-$MAKE distcheck
+yl_distcheck
 
 :
diff --git a/t/lex-nodist.sh b/t/lex-nodist.sh
old mode 100755
new mode 100644
diff --git a/t/lex-noyywrap.sh b/t/lex-noyywrap.sh
old mode 100755
new mode 100644
diff --git a/t/lex-pr204.sh b/t/lex-pr204.sh
old mode 100755
new mode 100644
diff --git a/t/lex-subobj-nodep.sh b/t/lex-subobj-nodep.sh
old mode 100755
new mode 100644
diff --git a/t/lex.sh b/t/lex.sh
old mode 100755
new mode 100644
diff --git a/t/lex2.sh b/t/lex2.sh
old mode 100755
new mode 100644
diff --git a/t/lex3.sh b/t/lex3.sh
old mode 100755
new mode 100644
diff --git a/t/lex5.sh b/t/lex5.sh
old mode 100755
new mode 100644
diff --git a/t/lexcpp.sh b/t/lexcpp.sh
old mode 100755
new mode 100644
diff --git a/t/lexvpath.sh b/t/lexvpath.sh
old mode 100755
new mode 100644
diff --git a/t/lflags.sh b/t/lflags.sh
old mode 100755
new mode 100644
index 3074bdf..18268b1
--- a/t/lflags.sh
+++ b/t/lflags.sh
@@ -31,7 +31,7 @@ chmod a+x fake-lex
 
 # Remove Lex from the environment, so that it won't interfere
 # with 'make -e' below.
-unset LEX || :
+unset LEX
 
 cat >> configure.ac <<'END'
 AC_SUBST([CC], [false])
diff --git a/t/lflags2.sh b/t/lflags2.sh
old mode 100755
new mode 100644
index 2507778..a959aea
--- a/t/lflags2.sh
+++ b/t/lflags2.sh
@@ -30,7 +30,7 @@ chmod a+x fake-lex
 
 # Remove Lex from the environment, so that it won't interfere
 # with 'make -e' below.
-unset LEX || :
+unset LEX
 
 cat >> configure.ac <<'END'
 AC_SUBST([CXX], [false])
diff --git a/t/libexec.sh b/t/libexec.sh
old mode 100755
new mode 100644
diff --git a/t/libobj-basic.sh b/t/libobj-basic.sh
old mode 100755
new mode 100644
diff --git a/t/libobj10.sh b/t/libobj10.sh
old mode 100755
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diff --git a/t/libobj12.sh b/t/libobj12.sh
old mode 100755
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diff --git a/t/libobj13.sh b/t/libobj13.sh
old mode 100755
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diff --git a/t/libobj14.sh b/t/libobj14.sh
old mode 100755
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diff --git a/t/libobj15a.sh b/t/libobj15a.sh
old mode 100755
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diff --git a/t/libobj15b.sh b/t/libobj15b.sh
old mode 100755
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diff --git a/t/libobj15c.sh b/t/libobj15c.sh
old mode 100755
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diff --git a/t/libobj16a.sh b/t/libobj16a.sh
old mode 100755
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old mode 100755
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old mode 100755
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old mode 100755
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diff --git a/t/libobj2.sh b/t/libobj2.sh
old mode 100755
new mode 100644
diff --git a/t/libobj20a.sh b/t/libobj20a.sh
old mode 100755
new mode 100644
diff --git a/t/libobj20b.sh b/t/libobj20b.sh
old mode 100755
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diff --git a/t/libobj20c.sh b/t/libobj20c.sh
old mode 100755
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diff --git a/t/libobj3.sh b/t/libobj3.sh
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diff --git a/t/libobj7.sh b/t/libobj7.sh
old mode 100755
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diff --git a/t/library.sh b/t/library.sh
old mode 100755
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diff --git a/t/library2.sh b/t/library2.sh
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diff --git a/t/library3.sh b/t/library3.sh
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diff --git a/t/libtoo10.sh b/t/libtoo10.sh
old mode 100755
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diff --git a/t/libtoo11.sh b/t/libtoo11.sh
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diff --git a/t/libtool-macros.sh b/t/libtool-macros.sh
old mode 100755
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diff --git a/t/libtool.sh b/t/libtool.sh
old mode 100755
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diff --git a/t/libtool2.sh b/t/libtool2.sh
old mode 100755
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diff --git a/t/libtool3.sh b/t/libtool3.sh
old mode 100755
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diff --git a/t/libtool4.sh b/t/libtool4.sh
old mode 100755
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diff --git a/t/libtool5.sh b/t/libtool5.sh
old mode 100755
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diff --git a/t/libtool6.sh b/t/libtool6.sh
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diff --git a/t/libtool7.sh b/t/libtool7.sh
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diff --git a/t/libtool8.sh b/t/libtool8.sh
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diff --git a/t/libtool9.sh b/t/libtool9.sh
old mode 100755
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diff --git a/t/license.sh b/t/license.sh
old mode 100755
new mode 100644
diff --git a/t/license2.sh b/t/license2.sh
old mode 100755
new mode 100644
diff --git a/t/link_c_cxx.sh b/t/link_c_cxx.sh
old mode 100755
new mode 100644
diff --git a/t/link_cond.sh b/t/link_cond.sh
old mode 100755
new mode 100644
diff --git a/t/link_dist.sh b/t/link_dist.sh
old mode 100755
new mode 100644
diff --git a/t/link_f90_only.sh b/t/link_f90_only.sh
old mode 100755
new mode 100644
diff --git a/t/link_f_only.sh b/t/link_f_only.sh
old mode 100755
new mode 100644
diff --git a/t/link_fc.sh b/t/link_fc.sh
old mode 100755
new mode 100644
diff --git a/t/link_fccxx.sh b/t/link_fccxx.sh
old mode 100755
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diff --git a/t/link_fcxx.sh b/t/link_fcxx.sh
old mode 100755
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diff --git a/t/link_override.sh b/t/link_override.sh
old mode 100755
new mode 100644
diff --git a/t/lisp-flags.sh b/t/lisp-flags.sh
old mode 100755
new mode 100644
index 1ea5b8e..a31bcfd
--- a/t/lisp-flags.sh
+++ b/t/lisp-flags.sh
@@ -20,7 +20,7 @@
 
 # Don't get fooled when running as an Emacs subprocess.  This is
 # for the benefit of the "make -e" invocation below.
-EMACS=; unset EMACS
+unset EMACS
 
 cat > Makefile.am << 'EOF'
 lisp_LISP = foo.el
diff --git a/t/lisp-loadpath.sh b/t/lisp-loadpath.sh
old mode 100755
new mode 100644
diff --git a/t/lisp-pr11806.sh b/t/lisp-pr11806.sh
old mode 100755
new mode 100644
diff --git a/t/lisp-subdir-mix.sh b/t/lisp-subdir-mix.sh
old mode 100755
new mode 100644
diff --git a/t/lisp-subdir.sh b/t/lisp-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/lisp-subdir2.sh b/t/lisp-subdir2.sh
old mode 100755
new mode 100644
diff --git a/t/lisp2.sh b/t/lisp2.sh
old mode 100755
new mode 100644
diff --git a/t/lisp3.sh b/t/lisp3.sh
old mode 100755
new mode 100644
diff --git a/t/lisp4.sh b/t/lisp4.sh
old mode 100755
new mode 100644
diff --git a/t/lisp5.sh b/t/lisp5.sh
old mode 100755
new mode 100644
diff --git a/t/lisp6.sh b/t/lisp6.sh
old mode 100755
new mode 100644
index 4b5f006..0dd4344
--- a/t/lisp6.sh
+++ b/t/lisp6.sh
@@ -39,7 +39,7 @@ AC_OUTPUT
 EOF
 
 # Avoid possible spurious influences from the environment.
-want_two=; unset want_two
+unset want_two
 
 echo "(provide 'am-one)" > am-one.el
 echo "(require 'am-one)" > am-two.el
diff --git a/t/lisp7.sh b/t/lisp7.sh
old mode 100755
new mode 100644
diff --git a/t/lisp8.sh b/t/lisp8.sh
old mode 100755
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diff --git a/t/lispdry.sh b/t/lispdry.sh
old mode 100755
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diff --git a/t/listval.sh b/t/listval.sh
old mode 100755
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diff --git a/t/location.sh b/t/location.sh
old mode 100755
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diff --git a/t/longlin2.sh b/t/longlin2.sh
old mode 100755
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diff --git a/t/longline.sh b/t/longline.sh
old mode 100755
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diff --git a/t/ltcond.sh b/t/ltcond.sh
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diff --git a/t/ltcond2.sh b/t/ltcond2.sh
old mode 100755
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diff --git a/t/ltconv.sh b/t/ltconv.sh
old mode 100755
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diff --git a/t/ltdeps.sh b/t/ltdeps.sh
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diff --git a/t/ltinit.sh b/t/ltinit.sh
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diff --git a/t/ltinstloc.sh b/t/ltinstloc.sh
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diff --git a/t/ltlibobjs.sh b/t/ltlibobjs.sh
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diff --git a/t/ltlibsrc.sh b/t/ltlibsrc.sh
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diff --git a/t/ltorder.sh b/t/ltorder.sh
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diff --git a/t/m4-inclusion.sh b/t/m4-inclusion.sh
old mode 100755
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diff --git a/t/maintclean-vpath.sh b/t/maintclean-vpath.sh
old mode 100755
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diff --git a/t/maintclean.sh b/t/maintclean.sh
old mode 100755
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diff --git a/t/maintmode-configure-msg.sh b/t/maintmode-configure-msg.sh
old mode 100755
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diff --git a/t/make-dryrun.tap b/t/make-dryrun.tap
old mode 100755
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diff --git a/t/make-is-gnu.sh b/t/make-is-gnu.sh
old mode 100755
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diff --git a/t/make-keepgoing.tap b/t/make-keepgoing.tap
old mode 100755
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diff --git a/t/make.sh b/t/make.sh
old mode 100755
new mode 100644
diff --git a/t/makefile-deps.sh b/t/makefile-deps.sh
old mode 100755
new mode 100644
diff --git a/t/makej.sh b/t/makej.sh
old mode 100755
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diff --git a/t/makej2.sh b/t/makej2.sh
old mode 100755
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diff --git a/t/maken.sh b/t/maken.sh
old mode 100755
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diff --git a/t/maken3.sh b/t/maken3.sh
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diff --git a/t/makevars.sh b/t/makevars.sh
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diff --git a/t/man.sh b/t/man.sh
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diff --git a/t/man2.sh b/t/man2.sh
old mode 100755
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diff --git a/t/man3.sh b/t/man3.sh
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diff --git a/t/man5.sh b/t/man5.sh
old mode 100755
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diff --git a/t/man6.sh b/t/man6.sh
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diff --git a/t/man7.sh b/t/man7.sh
old mode 100755
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diff --git a/t/man8.sh b/t/man8.sh
old mode 100755
new mode 100644
diff --git a/t/mdate.sh b/t/mdate.sh
old mode 100755
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diff --git a/t/mdate2.sh b/t/mdate2.sh
old mode 100755
new mode 100644
diff --git a/t/mdate3.sh b/t/mdate3.sh
old mode 100755
new mode 100644
diff --git a/t/mdate4.sh b/t/mdate4.sh
old mode 100755
new mode 100644
diff --git a/t/mdate5.sh b/t/mdate5.sh
old mode 100755
new mode 100644
diff --git a/t/mdate6.sh b/t/mdate6.sh
old mode 100755
new mode 100644
diff --git a/t/missing-auxfile-stops-makefiles-creation.sh 
b/t/missing-auxfile-stops-makefiles-creation.sh
old mode 100755
new mode 100644
index 50aa48a..754b316
--- a/t/missing-auxfile-stops-makefiles-creation.sh
+++ b/t/missing-auxfile-stops-makefiles-creation.sh
@@ -36,7 +36,7 @@ done
 
 $ACLOCAL
 
-unset AUTOMAKE_JOBS || :
+unset AUTOMAKE_JOBS
 
 AUTOMAKE_fails
 ls -l Makefile.in */Makefile.in || : # For debugging.
diff --git a/t/missing-version-mismatch.sh b/t/missing-version-mismatch.sh
old mode 100755
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diff --git a/t/missing3.sh b/t/missing3.sh
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diff --git a/t/mkdir_p.sh b/t/mkdir_p.sh
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diff --git a/t/mkdirp-deprecation.sh b/t/mkdirp-deprecation.sh
old mode 100755
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diff --git a/t/mkinst2.sh b/t/mkinst2.sh
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diff --git a/t/mkinst3.sh b/t/mkinst3.sh
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diff --git a/t/mkinstall.sh b/t/mkinstall.sh
old mode 100755
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diff --git a/t/mmode.sh b/t/mmode.sh
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diff --git a/t/mmodely.sh b/t/mmodely.sh
old mode 100755
new mode 100644
diff --git a/t/no-extra-makefile-code.sh b/t/no-extra-makefile-code.sh
old mode 100755
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diff --git a/t/no-spurious-install-recursive.sh 
b/t/no-spurious-install-recursive.sh
old mode 100755
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diff --git a/t/nobase-libtool.sh b/t/nobase-libtool.sh
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diff --git a/t/nobase-nodist.sh b/t/nobase-nodist.sh
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diff --git a/t/nobase-python.sh b/t/nobase-python.sh
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diff --git a/t/nobase.sh b/t/nobase.sh
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diff --git a/t/nodef.sh b/t/nodef.sh
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diff --git a/t/nodist.sh b/t/nodist.sh
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diff --git a/t/nodist2.sh b/t/nodist2.sh
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diff --git a/t/noinst.sh b/t/noinst.sh
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diff --git a/t/noinstdir.sh b/t/noinstdir.sh
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diff --git a/t/nolink.sh b/t/nolink.sh
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diff --git a/t/nostdinc.sh b/t/nostdinc.sh
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diff --git a/t/notrans.sh b/t/notrans.sh
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diff --git a/t/number.sh b/t/number.sh
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diff --git a/t/objc-basic.sh b/t/objc-basic.sh
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diff --git a/t/objc-deps.sh b/t/objc-deps.sh
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diff --git a/t/objc-flags.sh b/t/objc-flags.sh
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diff --git a/t/objc-megademo.sh b/t/objc-megademo.sh
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diff --git a/t/objc-minidemo.sh b/t/objc-minidemo.sh
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diff --git a/t/objcxx-basic.sh b/t/objcxx-basic.sh
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diff --git a/t/objcxx-deps.sh b/t/objcxx-deps.sh
old mode 100755
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diff --git a/t/objcxx-flags.sh b/t/objcxx-flags.sh
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diff --git a/t/objcxx-minidemo.sh b/t/objcxx-minidemo.sh
old mode 100755
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diff --git a/t/objext-pr10128.sh b/t/objext-pr10128.sh
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diff --git a/t/oldvars.sh b/t/oldvars.sh
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diff --git a/t/order.sh b/t/order.sh
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diff --git a/t/output-order.sh b/t/output-order.sh
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diff --git a/t/output.sh b/t/output.sh
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diff --git a/t/output10.sh b/t/output10.sh
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diff --git a/t/output12.sh b/t/output12.sh
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diff --git a/t/output13.sh b/t/output13.sh
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diff --git a/t/output2.sh b/t/output2.sh
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diff --git a/t/output3.sh b/t/output3.sh
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diff --git a/t/output4.sh b/t/output4.sh
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diff --git a/t/output5.sh b/t/output5.sh
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diff --git a/t/output6.sh b/t/output6.sh
old mode 100755
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diff --git a/t/output7.sh b/t/output7.sh
old mode 100755
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diff --git a/t/output8.sh b/t/output8.sh
old mode 100755
new mode 100644
diff --git a/t/output9.sh b/t/output9.sh
old mode 100755
new mode 100644
diff --git a/t/override-conditional-1.sh b/t/override-conditional-1.sh
old mode 100755
new mode 100644
diff --git a/t/override-conditional-2.sh b/t/override-conditional-2.sh
old mode 100755
new mode 100644
diff --git a/t/override-html.sh b/t/override-html.sh
old mode 100755
new mode 100644
diff --git a/t/override-suggest-local.sh b/t/override-suggest-local.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-am.sh b/t/parallel-am.sh
old mode 100755
new mode 100644
index 4be5eea..ea39518
--- a/t/parallel-am.sh
+++ b/t/parallel-am.sh
@@ -80,7 +80,7 @@ $ACLOCAL
 # Further, automake output should be stable.
 
 # Generate expected output using the non-threaded code.
-unset AUTOMAKE_JOBS || :
+unset AUTOMAKE_JOBS
 AUTOMAKE_run --add-missing
 mv stderr expected
 Makefile_ins=$(find . -name Makefile.in)
diff --git a/t/parallel-am2.sh b/t/parallel-am2.sh
old mode 100755
new mode 100644
index 2f8627d..10fc51b
--- a/t/parallel-am2.sh
+++ b/t/parallel-am2.sh
@@ -60,7 +60,7 @@ $ACLOCAL
 # Thus we install the auxiliary files in a prior step.
 
 # Generate expected output using non-threaded code.
-unset AUTOMAKE_JOBS || :
+unset AUTOMAKE_JOBS
 rm -f install-sh missing depcomp
 AUTOMAKE_fails --add-missing
 mv stderr expected
diff --git a/t/parallel-am3.sh b/t/parallel-am3.sh
old mode 100755
new mode 100644
index 1c87e63..146e59f
--- a/t/parallel-am3.sh
+++ b/t/parallel-am3.sh
@@ -56,7 +56,7 @@ mkdir build-aux
 $ACLOCAL
 
 # Generate expected output using the non-threaded code.
-unset AUTOMAKE_JOBS || :
+unset AUTOMAKE_JOBS
 AUTOMAKE_run --add-missing
 mv stderr expected
 mv Makefile.in Makefile.in.exp
diff --git a/t/parallel-tests-basics.sh b/t/parallel-tests-basics.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-cmdline-override.sh 
b/t/parallel-tests-cmdline-override.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-concurrency-2.sh 
b/t/parallel-tests-concurrency-2.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-concurrency.sh b/t/parallel-tests-concurrency.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-console-output.sh 
b/t/parallel-tests-console-output.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-driver-install.sh 
b/t/parallel-tests-driver-install.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-dry-run-1.sh b/t/parallel-tests-dry-run-1.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-dry-run-2.sh b/t/parallel-tests-dry-run-2.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-empty-testlogs.sh 
b/t/parallel-tests-empty-testlogs.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-empty.sh b/t/parallel-tests-empty.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-exeext.sh b/t/parallel-tests-exeext.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-exit-statuses.sh 
b/t/parallel-tests-exit-statuses.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-extra-programs.sh 
b/t/parallel-tests-extra-programs.sh
old mode 100755
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diff --git a/t/parallel-tests-fd-redirect-exeext.sh 
b/t/parallel-tests-fd-redirect-exeext.sh
old mode 100755
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diff --git a/t/parallel-tests-fd-redirect.sh b/t/parallel-tests-fd-redirect.sh
old mode 100755
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diff --git a/t/parallel-tests-fork-bomb.sh b/t/parallel-tests-fork-bomb.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-generated-and-distributed.sh 
b/t/parallel-tests-generated-and-distributed.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-harderror.sh b/t/parallel-tests-harderror.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-interrupt.tap b/t/parallel-tests-interrupt.tap
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-log-compiler-1.sh 
b/t/parallel-tests-log-compiler-1.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-log-compiler-2.sh 
b/t/parallel-tests-log-compiler-2.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-log-compiler-example.sh 
b/t/parallel-tests-log-compiler-example.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-log-override-1.sh 
b/t/parallel-tests-log-override-1.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-log-override-2.sh 
b/t/parallel-tests-log-override-2.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-log-override-recheck.sh 
b/t/parallel-tests-log-override-recheck.sh
old mode 100755
new mode 100644
index c2ea05d..d1fec7f
--- a/t/parallel-tests-log-override-recheck.sh
+++ b/t/parallel-tests-log-override-recheck.sh
@@ -47,7 +47,7 @@ END
 
 chmod a+x *.test
 
-unset BAZ_EXIT_STATUS || :
+unset BAZ_EXIT_STATUS
 
 $ACLOCAL
 $AUTOCONF
diff --git a/t/parallel-tests-no-color-in-log.sh 
b/t/parallel-tests-no-color-in-log.sh
old mode 100755
new mode 100644
diff --git a/t/parallel-tests-no-spurious-summary.sh 
b/t/parallel-tests-no-spurious-summary.sh
old mode 100755
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diff --git a/t/parallel-tests-once.sh b/t/parallel-tests-once.sh
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diff --git a/t/parallel-tests-recheck-depends-on-all.sh 
b/t/parallel-tests-recheck-depends-on-all.sh
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diff --git a/t/parallel-tests-recheck-pr11791.sh 
b/t/parallel-tests-recheck-pr11791.sh
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diff --git a/t/parallel-tests-recheck.sh b/t/parallel-tests-recheck.sh
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diff --git a/t/parallel-tests-reset-term.sh b/t/parallel-tests-reset-term.sh
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diff --git a/t/parallel-tests-subdir.sh b/t/parallel-tests-subdir.sh
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diff --git a/t/parallel-tests-suffix-prog.sh b/t/parallel-tests-suffix-prog.sh
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diff --git a/t/parallel-tests-suffix.sh b/t/parallel-tests-suffix.sh
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diff --git a/t/parallel-tests-trailing-whitespace.sh 
b/t/parallel-tests-trailing-whitespace.sh
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diff --git a/t/parallel-tests-unreadable.sh b/t/parallel-tests-unreadable.sh
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diff --git a/t/parse.sh b/t/parse.sh
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new mode 100644
diff --git a/t/per-target-flags.sh b/t/per-target-flags.sh
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diff --git a/t/percent.sh b/t/percent.sh
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diff --git a/t/percent2.sh b/t/percent2.sh
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diff --git a/t/phony.sh b/t/phony.sh
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diff --git a/t/pkg-config-macros.sh b/t/pkg-config-macros.sh
old mode 100755
new mode 100644
index 5069c08..cfa49cf
--- a/t/pkg-config-macros.sh
+++ b/t/pkg-config-macros.sh
@@ -78,7 +78,7 @@ else
    echo "skip_all_ \"pkg-config m4 macros not found\"" >> get.sh
 fi
 
-ACLOCAL_PATH=; unset ACLOCAL_PATH
+unset ACLOCAL_PATH
 . ./get.sh
 
 $ACLOCAL --force -I m4 || cat >> get.sh <<'END'
diff --git a/t/pluseq.sh b/t/pluseq.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq10.sh b/t/pluseq10.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq11.sh b/t/pluseq11.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq2.sh b/t/pluseq2.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq3.sh b/t/pluseq3.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq4.sh b/t/pluseq4.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq5.sh b/t/pluseq5.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq6.sh b/t/pluseq6.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq7.sh b/t/pluseq7.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq8.sh b/t/pluseq8.sh
old mode 100755
new mode 100644
diff --git a/t/pluseq9.sh b/t/pluseq9.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-data.sh b/t/posixsubst-data.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-extradist.sh b/t/posixsubst-extradist.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-ldadd.sh b/t/posixsubst-ldadd.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-libraries.sh b/t/posixsubst-libraries.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-ltlibraries.sh b/t/posixsubst-ltlibraries.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-programs.sh b/t/posixsubst-programs.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-scripts.sh b/t/posixsubst-scripts.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-sources.sh b/t/posixsubst-sources.sh
old mode 100755
new mode 100644
diff --git a/t/posixsubst-tests.sh b/t/posixsubst-tests.sh
old mode 100755
new mode 100644
diff --git a/t/postproc.sh b/t/postproc.sh
old mode 100755
new mode 100644
diff --git a/t/ppf77.sh b/t/ppf77.sh
old mode 100755
new mode 100644
diff --git a/t/pr2.sh b/t/pr2.sh
old mode 100755
new mode 100644
diff --git a/t/pr211.sh b/t/pr211.sh
old mode 100755
new mode 100644
diff --git a/t/pr220.sh b/t/pr220.sh
old mode 100755
new mode 100644
diff --git a/t/pr224.sh b/t/pr224.sh
old mode 100755
new mode 100644
diff --git a/t/pr229.sh b/t/pr229.sh
old mode 100755
new mode 100644
diff --git a/t/pr243.sh b/t/pr243.sh
old mode 100755
new mode 100644
diff --git a/t/pr266.sh b/t/pr266.sh
old mode 100755
new mode 100644
diff --git a/t/pr279-2.sh b/t/pr279-2.sh
old mode 100755
new mode 100644
diff --git a/t/pr279.sh b/t/pr279.sh
old mode 100755
new mode 100644
diff --git a/t/pr287.sh b/t/pr287.sh
old mode 100755
new mode 100644
diff --git a/t/pr300-lib.sh b/t/pr300-lib.sh
old mode 100755
new mode 100644
diff --git a/t/pr300-ltlib.sh b/t/pr300-ltlib.sh
old mode 100755
new mode 100644
diff --git a/t/pr300-prog.sh b/t/pr300-prog.sh
old mode 100755
new mode 100644
diff --git a/t/pr307.sh b/t/pr307.sh
old mode 100755
new mode 100644
diff --git a/t/pr401.sh b/t/pr401.sh
old mode 100755
new mode 100644
diff --git a/t/pr401b.sh b/t/pr401b.sh
old mode 100755
new mode 100644
diff --git a/t/pr401c.sh b/t/pr401c.sh
old mode 100755
new mode 100644
diff --git a/t/pr72.sh b/t/pr72.sh
old mode 100755
new mode 100644
diff --git a/t/pr87.sh b/t/pr87.sh
old mode 100755
new mode 100644
diff --git a/t/pr9.sh b/t/pr9.sh
old mode 100755
new mode 100644
diff --git a/t/prefix.sh b/t/prefix.sh
old mode 100755
new mode 100644
diff --git a/t/preproc-basics.sh b/t/preproc-basics.sh
old mode 100755
new mode 100644
diff --git a/t/preproc-c-compile.sh b/t/preproc-c-compile.sh
old mode 100755
new mode 100644
diff --git a/t/preproc-demo.sh b/t/preproc-demo.sh
old mode 100755
new mode 100644
diff --git a/t/preproc-errmsg.sh b/t/preproc-errmsg.sh
old mode 100755
new mode 100644
diff --git a/t/primary-prefix-couples-documented-valid.sh 
b/t/primary-prefix-couples-documented-valid.sh
old mode 100755
new mode 100644
diff --git a/t/primary-prefix-couples-force-valid.sh 
b/t/primary-prefix-couples-force-valid.sh
old mode 100755
new mode 100644
diff --git a/t/primary-prefix-invalid-couples.tap 
b/t/primary-prefix-invalid-couples.tap
old mode 100755
new mode 100644
diff --git a/t/primary-prefix-valid-couples.sh 
b/t/primary-prefix-valid-couples.sh
old mode 100755
new mode 100644
diff --git a/t/primary.sh b/t/primary.sh
old mode 100755
new mode 100644
diff --git a/t/primary2.sh b/t/primary2.sh
old mode 100755
new mode 100644
diff --git a/t/primary3.sh b/t/primary3.sh
old mode 100755
new mode 100644
diff --git a/t/print-libdir.sh b/t/print-libdir.sh
old mode 100755
new mode 100644
diff --git a/t/proginst.sh b/t/proginst.sh
old mode 100755
new mode 100644
diff --git a/t/programs-primary-rewritten.sh b/t/programs-primary-rewritten.sh
old mode 100755
new mode 100644
diff --git a/t/py-compile-basedir.sh b/t/py-compile-basedir.sh
old mode 100755
new mode 100644
diff --git a/t/py-compile-basic.sh b/t/py-compile-basic.sh
old mode 100755
new mode 100644
diff --git a/t/py-compile-destdir.sh b/t/py-compile-destdir.sh
old mode 100755
new mode 100644
diff --git a/t/py-compile-env.sh b/t/py-compile-env.sh
old mode 100755
new mode 100644
diff --git a/t/py-compile-option-terminate.sh b/t/py-compile-option-terminate.sh
old mode 100755
new mode 100644
diff --git a/t/py-compile-usage.sh b/t/py-compile-usage.sh
old mode 100755
new mode 100644
diff --git a/t/python-am-path-iftrue.sh b/t/python-am-path-iftrue.sh
old mode 100755
new mode 100644
diff --git a/t/python-dist.sh b/t/python-dist.sh
old mode 100755
new mode 100644
diff --git a/t/python-missing.sh b/t/python-missing.sh
old mode 100755
new mode 100644
index 0a9a073..66eca9e
--- a/t/python-missing.sh
+++ b/t/python-missing.sh
@@ -22,7 +22,7 @@ am_create_testdir=empty
 # An actual python is *not* required in this test.
 . test-init.sh
 
-PYTHON=; unset PYTHON
+unset PYTHON
 
 cat > configure.ac <<END
 AC_INIT([$me], [1.0])
diff --git a/t/python-pr10995.sh b/t/python-pr10995.sh
old mode 100755
new mode 100644
diff --git a/t/python-too-old.sh b/t/python-too-old.sh
old mode 100755
new mode 100644
index 6a81215..0042799
--- a/t/python-too-old.sh
+++ b/t/python-too-old.sh
@@ -35,7 +35,7 @@ py_too_old ()
 }
 
 saved_PYTHON=$PYTHON; export saved_PYTHON
-PYTHON=; unset PYTHON
+unset PYTHON
 
 cat > configure.ac <<END
 AC_INIT([$me], [1.0])
diff --git a/t/python-vars.sh b/t/python-vars.sh
old mode 100755
new mode 100644
diff --git a/t/python-virtualenv.sh b/t/python-virtualenv.sh
old mode 100755
new mode 100644
diff --git a/t/python.sh b/t/python.sh
old mode 100755
new mode 100644
diff --git a/t/python10.sh b/t/python10.sh
old mode 100755
new mode 100644
diff --git a/t/python11.sh b/t/python11.sh
old mode 100755
new mode 100644
index c5fedf7..faf09d8
--- a/t/python11.sh
+++ b/t/python11.sh
@@ -20,7 +20,7 @@
 . test-init.sh
 
 # We don't want to allow user overrides in this test.
-PYTHON=; unset PYTHON
+unset PYTHON
 
 cat >>configure.ac <<'EOF'
 m4_define([_AM_PYTHON_INTERPRETER_LIST], [IShouldNotExist1 IShouldNotExist2])
diff --git a/t/python12.sh b/t/python12.sh
old mode 100755
new mode 100644
diff --git a/t/python2.sh b/t/python2.sh
old mode 100755
new mode 100644
diff --git a/t/python3.sh b/t/python3.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-deeply-nested.sh b/t/recurs-user-deeply-nested.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-indir.sh b/t/recurs-user-indir.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-keep-going.sh b/t/recurs-user-keep-going.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-many.sh b/t/recurs-user-many.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-no-subdirs.sh b/t/recurs-user-no-subdirs.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-no-top-level.sh b/t/recurs-user-no-top-level.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-override.sh b/t/recurs-user-override.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-phony.sh b/t/recurs-user-phony.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user-wrap.sh b/t/recurs-user-wrap.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user.sh b/t/recurs-user.sh
old mode 100755
new mode 100644
diff --git a/t/recurs-user2.sh b/t/recurs-user2.sh
old mode 100755
new mode 100644
diff --git a/t/relativize.tap b/t/relativize.tap
old mode 100755
new mode 100644
diff --git a/t/remake-aclocal-version-mismatch.sh 
b/t/remake-aclocal-version-mismatch.sh
old mode 100755
new mode 100644
diff --git a/t/remake-after-acinclude-m4.sh b/t/remake-after-acinclude-m4.sh
old mode 100755
new mode 100644
diff --git a/t/remake-after-aclocal-m4.sh b/t/remake-after-aclocal-m4.sh
old mode 100755
new mode 100644
diff --git a/t/remake-after-configure-ac.sh b/t/remake-after-configure-ac.sh
old mode 100755
new mode 100644
diff --git a/t/remake-after-makefile-am.sh b/t/remake-after-makefile-am.sh
old mode 100755
new mode 100644
diff --git a/t/remake-all-1.sh b/t/remake-all-1.sh
old mode 100755
new mode 100644
diff --git a/t/remake-all-2.sh b/t/remake-all-2.sh
old mode 100755
new mode 100644
diff --git a/t/remake-am-pr10111.sh b/t/remake-am-pr10111.sh
old mode 100755
new mode 100644
diff --git a/t/remake-config-status-dependencies.sh 
b/t/remake-config-status-dependencies.sh
old mode 100755
new mode 100644
diff --git a/t/remake-configure-dependencies.sh 
b/t/remake-configure-dependencies.sh
old mode 100755
new mode 100644
diff --git a/t/remake-deeply-nested.sh b/t/remake-deeply-nested.sh
old mode 100755
new mode 100644
index d17fd57..e054c20
--- a/t/remake-deeply-nested.sh
+++ b/t/remake-deeply-nested.sh
@@ -30,7 +30,7 @@ echo "AC_SUBST([FOO], [$magic1])" >> configure.ac
 
 echo "@FOO@" > bar.in
 echo "AC_CONFIG_FILES([bar])" >> configure.ac
-d=; unset d # Avoid unduly interferences from the environment.
+unset d # Avoid unduly interferences from the environment.
 for i in 0 1 2 3 4 5 6 7 8 9; do
   d=${d+"$d/"}sub$i
   echo "SUBDIRS = sub$i" > Makefile.am
diff --git a/t/remake-deleted-am-2.sh b/t/remake-deleted-am-2.sh
old mode 100755
new mode 100644
diff --git a/t/remake-deleted-am-subdir.sh b/t/remake-deleted-am-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/remake-deleted-am.sh b/t/remake-deleted-am.sh
old mode 100755
new mode 100644
diff --git a/t/remake-deleted-m4-file.sh b/t/remake-deleted-m4-file.sh
old mode 100755
new mode 100644
diff --git a/t/remake-fail.sh b/t/remake-fail.sh
old mode 100755
new mode 100644
diff --git a/t/remake-gnulib-add-acsubst.sh b/t/remake-gnulib-add-acsubst.sh
old mode 100755
new mode 100644
diff --git a/t/remake-gnulib-add-header.sh b/t/remake-gnulib-add-header.sh
old mode 100755
new mode 100644
diff --git a/t/remake-gnulib-remove-header.sh b/t/remake-gnulib-remove-header.sh
old mode 100755
new mode 100644
diff --git a/t/remake-include-aclocal.sh b/t/remake-include-aclocal.sh
old mode 100755
new mode 100644
diff --git a/t/remake-include-configure.sh b/t/remake-include-configure.sh
old mode 100755
new mode 100644
diff --git a/t/remake-include-makefile.sh b/t/remake-include-makefile.sh
old mode 100755
new mode 100644
diff --git a/t/remake-m4-pr10111.sh b/t/remake-m4-pr10111.sh
old mode 100755
new mode 100644
diff --git a/t/remake-macrodir.sh b/t/remake-macrodir.sh
old mode 100755
new mode 100644
diff --git a/t/remake-maintainer-mode.sh b/t/remake-maintainer-mode.sh
old mode 100755
new mode 100644
diff --git a/t/remake-makefile-intree.sh b/t/remake-makefile-intree.sh
old mode 100755
new mode 100644
diff --git a/t/remake-makefile-vpath.sh b/t/remake-makefile-vpath.sh
old mode 100755
new mode 100644
diff --git a/t/remake-mild-stress.sh b/t/remake-mild-stress.sh
old mode 100755
new mode 100644
diff --git a/t/remake-moved-m4-file.sh b/t/remake-moved-m4-file.sh
old mode 100755
new mode 100644
diff --git a/t/remake-not-after-make-dist.sh b/t/remake-not-after-make-dist.sh
old mode 100755
new mode 100644
diff --git a/t/remake-recurs-user.sh b/t/remake-recurs-user.sh
old mode 100755
new mode 100644
diff --git a/t/remake-renamed-am.sh b/t/remake-renamed-am.sh
old mode 100755
new mode 100644
diff --git a/t/remake-renamed-m4-file.sh b/t/remake-renamed-m4-file.sh
old mode 100755
new mode 100644
diff --git a/t/remake-renamed-m4-macro-and-file.sh 
b/t/remake-renamed-m4-macro-and-file.sh
old mode 100755
new mode 100644
diff --git a/t/remake-renamed-m4-macro.sh b/t/remake-renamed-m4-macro.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir-from-subdir.sh b/t/remake-subdir-from-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir-gnu.sh b/t/remake-subdir-gnu.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir-grepping.sh b/t/remake-subdir-grepping.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir-long-time.sh b/t/remake-subdir-long-time.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir-no-makefile.sh b/t/remake-subdir-no-makefile.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir-only.sh b/t/remake-subdir-only.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir.sh b/t/remake-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir2.sh b/t/remake-subdir2.sh
old mode 100755
new mode 100644
diff --git a/t/remake-subdir3.sh b/t/remake-subdir3.sh
old mode 100755
new mode 100644
diff --git a/t/remake-timing-bug-pr8365.sh b/t/remake-timing-bug-pr8365.sh
old mode 100755
new mode 100644
diff --git a/t/repeated-options.sh b/t/repeated-options.sh
old mode 100755
new mode 100644
diff --git a/t/reqd2.sh b/t/reqd2.sh
old mode 100755
new mode 100644
diff --git a/t/rm-f-probe.sh b/t/rm-f-probe.sh
old mode 100755
new mode 100644
diff --git a/t/rulepat.sh b/t/rulepat.sh
old mode 100755
new mode 100644
diff --git a/t/sanity.sh b/t/sanity.sh
old mode 100755
new mode 100644
diff --git a/t/seenc.sh b/t/seenc.sh
old mode 100755
new mode 100644
diff --git a/t/self-check-cc-no-c-o.sh b/t/self-check-cc-no-c-o.sh
old mode 100755
new mode 100644
diff --git a/t/self-check-configure-help.sh b/t/self-check-configure-help.sh
old mode 100755
new mode 100644
diff --git a/t/self-check-dir.tap b/t/self-check-dir.tap
old mode 100755
new mode 100644
index b871b66..68e9edf
--- a/t/self-check-dir.tap
+++ b/t/self-check-dir.tap
@@ -24,7 +24,7 @@ am_create_testdir=no
 
 plan_ 5
 
-keep_testdirs=; unset keep_testdirs
+unset keep_testdirs
 
 # This needs to be consistent with what $AM_TEST_RUNNER_SHELL
 # deems to be the current working directory.
diff --git a/t/self-check-exit.tap b/t/self-check-exit.tap
old mode 100755
new mode 100644
diff --git a/t/self-check-explicit-skips.sh b/t/self-check-explicit-skips.sh
old mode 100755
new mode 100644
diff --git a/t/self-check-is-blocked-signal.tap 
b/t/self-check-is-blocked-signal.tap
old mode 100755
new mode 100644
diff --git a/t/self-check-is_newest.tap b/t/self-check-is_newest.tap
old mode 100755
new mode 100644
diff --git a/t/self-check-me.tap b/t/self-check-me.tap
old mode 100755
new mode 100644
diff --git a/t/self-check-report.sh b/t/self-check-report.sh
old mode 100755
new mode 100644
index c52c567..99b9838
--- a/t/self-check-report.sh
+++ b/t/self-check-report.sh
@@ -18,7 +18,7 @@
 # Test subroutines to report warnings, and to signal failures, skips
 # and hard errors.
 
-unset stderr_fileno_ || :
+unset stderr_fileno_
 
 am_create_testdir=empty
 . test-init.sh
diff --git a/t/self-check-seq.tap b/t/self-check-seq.tap
old mode 100755
new mode 100644
index 3c5e2dc..4e9d58f
--- a/t/self-check-seq.tap
+++ b/t/self-check-seq.tap
@@ -21,7 +21,7 @@
 
 plan_ 14
 
-unset stderr_fileno_ || :
+unset stderr_fileno_
 
 check_work ()
 {
diff --git a/t/self-check-shell-no-trail-bslash.sh 
b/t/self-check-shell-no-trail-bslash.sh
old mode 100755
new mode 100644
diff --git a/t/self-check-unindent.tap b/t/self-check-unindent.tap
old mode 100755
new mode 100644
diff --git a/t/serial-tests.sh b/t/serial-tests.sh
old mode 100755
new mode 100644
diff --git a/t/silent-c.sh b/t/silent-c.sh
old mode 100755
new mode 100644
diff --git a/t/silent-configsite.sh b/t/silent-configsite.sh
old mode 100755
new mode 100644
index 1df7673..6146533
--- a/t/silent-configsite.sh
+++ b/t/silent-configsite.sh
@@ -33,7 +33,7 @@ test-nosilent:
        test x'$(AM_DEFAULT_VERBOSITY)' = x'1'
 EOF
 
-unset enable_silent_rules || :
+unset enable_silent_rules
 
 : 'No explicit default in configure.ac, enable by default in config.site'
 
diff --git a/t/silent-custom.sh b/t/silent-custom.sh
old mode 100755
new mode 100644
diff --git a/t/silent-cxx.sh b/t/silent-cxx.sh
old mode 100755
new mode 100644
diff --git a/t/silent-f77.sh b/t/silent-f77.sh
old mode 100755
new mode 100644
diff --git a/t/silent-f90.sh b/t/silent-f90.sh
old mode 100755
new mode 100644
diff --git a/t/silent-gen.sh b/t/silent-gen.sh
old mode 100755
new mode 100644
diff --git a/t/silent-lex.sh b/t/silent-lex.sh
old mode 100755
new mode 100644
diff --git a/t/silent-lt.sh b/t/silent-lt.sh
old mode 100755
new mode 100644
diff --git a/t/silent-many-languages.sh b/t/silent-many-languages.sh
old mode 100755
new mode 100644
diff --git a/t/silent-nested-vars.sh b/t/silent-nested-vars.sh
old mode 100755
new mode 100644
diff --git a/t/silent-texi.sh b/t/silent-texi.sh
old mode 100755
new mode 100644
diff --git a/t/silent-yacc-headers.sh b/t/silent-yacc-headers.sh
old mode 100755
new mode 100644
diff --git a/t/silent-yacc.sh b/t/silent-yacc.sh
old mode 100755
new mode 100644
diff --git a/t/sourcefile-in-subdir.sh b/t/sourcefile-in-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/space.sh b/t/space.sh
old mode 100755
new mode 100644
diff --git a/t/specflg-dummy.sh b/t/specflg-dummy.sh
old mode 100755
new mode 100644
diff --git a/t/specflg6.sh b/t/specflg6.sh
old mode 100755
new mode 100644
diff --git a/t/specflg7.sh b/t/specflg7.sh
old mode 100755
new mode 100644
diff --git a/t/specflg8.sh b/t/specflg8.sh
old mode 100755
new mode 100644
diff --git a/t/specflg9.sh b/t/specflg9.sh
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index 353585d..00c6da3
--- a/t/suffix6c.sh
+++ b/t/suffix6c.sh
@@ -31,7 +31,7 @@ AC_SUBST([OBJEXT])
 AC_OUTPUT
 END
 
-unset OBJEXT || :
+unset OBJEXT
 
 cat > Makefile.am << 'END'
 SUFFIXES = .zoo .o .obj address@hidden@
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index bbf3fbb..d5bbd56
--- a/t/tar-override.sh
+++ b/t/tar-override.sh
@@ -59,7 +59,7 @@ test "$(cat am--tar-has-run)" = foo
 
 clean_temp
 
-TAR=; unset TAR
+unset TAR
 # Creative use of eval to pacify maintainer checks.
 eval \$'MAKE dist "TAR=./am--tar mu"'
 test -f $distdir.tar.gz
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index 283e7d3..5f0e2f5
--- a/t/tests-environment-and-log-compiler.sh
+++ b/t/tests-environment-and-log-compiler.sh
@@ -24,7 +24,7 @@ cat >> configure.ac << 'END'
 AC_OUTPUT
 END
 
-unset v0 v1 v2 v3 v4 || :
+unset v0 v1 v2 v3 v4
 
 cat > Makefile.am << 'END'
 TESTS_ENVIRONMENT = am__f3 () { echo 3; }; v0='$(srcdir)' v1=1; :;
diff --git a/t/tests-environment-backcompat.sh 
b/t/tests-environment-backcompat.sh
old mode 100755
new mode 100644
diff --git a/t/tests-environment-fd-redirect.sh 
b/t/tests-environment-fd-redirect.sh
old mode 100755
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diff --git a/t/tests-environment.sh b/t/tests-environment.sh
old mode 100755
new mode 100644
diff --git a/t/testsuite-summary-color.sh b/t/testsuite-summary-color.sh
old mode 100755
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diff --git a/t/testsuite-summary-count-many.sh 
b/t/testsuite-summary-count-many.sh
old mode 100755
new mode 100644
diff --git a/t/testsuite-summary-count.sh b/t/testsuite-summary-count.sh
old mode 100755
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diff --git a/t/testsuite-summary-reference-log.sh 
b/t/testsuite-summary-reference-log.sh
old mode 100755
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diff --git a/t/transform.sh b/t/transform.sh
old mode 100755
new mode 100644
diff --git a/t/transform2.sh b/t/transform2.sh
old mode 100755
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diff --git a/t/transform3.sh b/t/transform3.sh
old mode 100755
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diff --git a/t/txinfo-absolute-srcdir-pr408.sh 
b/t/txinfo-absolute-srcdir-pr408.sh
old mode 100755
new mode 100644
diff --git a/t/txinfo-add-missing-and-dist.sh b/t/txinfo-add-missing-and-dist.sh
old mode 100755
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diff --git a/t/txinfo-bsd-make-recurs.sh b/t/txinfo-bsd-make-recurs.sh
old mode 100755
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diff --git a/t/txinfo-builddir.sh b/t/txinfo-builddir.sh
old mode 100755
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diff --git a/t/txinfo-clean.sh b/t/txinfo-clean.sh
old mode 100755
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diff --git a/t/txinfo-dvi-recurs.sh b/t/txinfo-dvi-recurs.sh
old mode 100755
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diff --git a/t/txinfo-info-in-srcdir.sh b/t/txinfo-info-in-srcdir.sh
old mode 100755
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diff --git a/t/txinfo-makeinfo-error-no-clobber.sh 
b/t/txinfo-makeinfo-error-no-clobber.sh
old mode 100755
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diff --git a/t/txinfo-many-output-formats-vpath.sh 
b/t/txinfo-many-output-formats-vpath.sh
old mode 100755
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diff --git a/t/txinfo-many-output-formats.sh b/t/txinfo-many-output-formats.sh
old mode 100755
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diff --git a/t/txinfo-no-clutter.sh b/t/txinfo-no-clutter.sh
old mode 100755
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diff --git a/t/txinfo-no-extra-dist.sh b/t/txinfo-no-extra-dist.sh
old mode 100755
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diff --git a/t/txinfo-no-installinfo.sh b/t/txinfo-no-installinfo.sh
old mode 100755
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diff --git a/t/txinfo-no-repeated-targets.sh b/t/txinfo-no-repeated-targets.sh
old mode 100755
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diff --git a/t/txinfo-nodist-info.sh b/t/txinfo-nodist-info.sh
old mode 100755
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diff --git a/t/txinfo-other-suffixes.sh b/t/txinfo-other-suffixes.sh
old mode 100755
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diff --git a/t/txinfo-override-infodeps.sh b/t/txinfo-override-infodeps.sh
old mode 100755
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diff --git a/t/txinfo-override-texinfo-tex.sh b/t/txinfo-override-texinfo-tex.sh
old mode 100755
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diff --git a/t/txinfo-setfilename-repeated.sh b/t/txinfo-setfilename-repeated.sh
old mode 100755
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diff --git a/t/txinfo-setfilename-suffix-strip.sh 
b/t/txinfo-setfilename-suffix-strip.sh
old mode 100755
new mode 100644
diff --git a/t/txinfo-subdir-pr343.sh b/t/txinfo-subdir-pr343.sh
old mode 100755
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diff --git a/t/txinfo-tex-dist.sh b/t/txinfo-tex-dist.sh
old mode 100755
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diff --git a/t/txinfo-unrecognized-extension.sh 
b/t/txinfo-unrecognized-extension.sh
old mode 100755
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diff --git a/t/txinfo-unrecognized-info-suffix.sh 
b/t/txinfo-unrecognized-info-suffix.sh
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diff --git a/t/txinfo-vtexi.sh b/t/txinfo-vtexi.sh
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diff --git a/t/txinfo-vtexi2.sh b/t/txinfo-vtexi2.sh
old mode 100755
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diff --git a/t/txinfo-vtexi3.sh b/t/txinfo-vtexi3.sh
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diff --git a/t/txinfo-vtexi4.sh b/t/txinfo-vtexi4.sh
old mode 100755
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diff --git a/t/txinfo-without-info-suffix.sh b/t/txinfo-without-info-suffix.sh
old mode 100755
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diff --git a/t/txinfo19.sh b/t/txinfo19.sh
old mode 100755
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diff --git a/t/txinfo23.sh b/t/txinfo23.sh
old mode 100755
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diff --git a/t/txinfo24.sh b/t/txinfo24.sh
old mode 100755
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diff --git a/t/txinfo25.sh b/t/txinfo25.sh
old mode 100755
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diff --git a/t/txinfo28.sh b/t/txinfo28.sh
old mode 100755
new mode 100644
diff --git a/t/uninstall-fail.sh b/t/uninstall-fail.sh
old mode 100755
new mode 100644
diff --git a/t/uninstall-pr9578.sh b/t/uninstall-pr9578.sh
old mode 100755
new mode 100644
diff --git a/t/unused.sh b/t/unused.sh
old mode 100755
new mode 100644
diff --git a/t/upc.sh b/t/upc.sh
old mode 100755
new mode 100644
diff --git a/t/upc2.sh b/t/upc2.sh
old mode 100755
new mode 100644
diff --git a/t/upc3.sh b/t/upc3.sh
old mode 100755
new mode 100644
diff --git a/t/vala-configure.sh b/t/vala-configure.sh
old mode 100755
new mode 100644
index cbba4bd..4f59d07
--- a/t/vala-configure.sh
+++ b/t/vala-configure.sh
@@ -53,7 +53,7 @@ chmod +x bin/valac.old
 PATH=$(pwd)/bin$PATH_SEPARATOR$PATH; export PATH
 
 # Avoid interferences from the environment.
-VALAC= vala_version=; unset VALAC vala_version
+unset VALAC vala_version
 
 $ACLOCAL
 $AUTOMAKE -a
diff --git a/t/vala-grepping.sh b/t/vala-grepping.sh
old mode 100755
new mode 100644
diff --git a/t/vala-headers.sh b/t/vala-headers.sh
old mode 100755
new mode 100644
diff --git a/t/vala-libs.sh b/t/vala-libs.sh
old mode 100755
new mode 100644
diff --git a/t/vala-mix.sh b/t/vala-mix.sh
old mode 100755
new mode 100644
diff --git a/t/vala-mix2.sh b/t/vala-mix2.sh
old mode 100755
new mode 100644
diff --git a/t/vala-non-recursive-setup.sh b/t/vala-non-recursive-setup.sh
old mode 100755
new mode 100644
diff --git a/t/vala-parallel.sh b/t/vala-parallel.sh
old mode 100755
new mode 100644
diff --git a/t/vala-per-target-flags.sh b/t/vala-per-target-flags.sh
old mode 100755
new mode 100644
diff --git a/t/vala-recursive-setup.sh b/t/vala-recursive-setup.sh
old mode 100755
new mode 100644
diff --git a/t/vala-vapi.sh b/t/vala-vapi.sh
old mode 100755
new mode 100644
diff --git a/t/vala-vpath.sh b/t/vala-vpath.sh
old mode 100755
new mode 100644
diff --git a/t/var-recurs.sh b/t/var-recurs.sh
old mode 100755
new mode 100644
diff --git a/t/var-recurs2.sh b/t/var-recurs2.sh
old mode 100755
new mode 100644
diff --git a/t/vars.sh b/t/vars.sh
old mode 100755
new mode 100644
diff --git a/t/vars3.sh b/t/vars3.sh
old mode 100755
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diff --git a/t/vartar.sh b/t/vartar.sh
old mode 100755
new mode 100644
diff --git a/t/vartypo2.sh b/t/vartypo2.sh
old mode 100755
new mode 100644
diff --git a/t/vartypos.sh b/t/vartypos.sh
old mode 100755
new mode 100644
diff --git a/t/version3.sh b/t/version3.sh
old mode 100755
new mode 100644
diff --git a/t/version4.sh b/t/version4.sh
old mode 100755
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diff --git a/t/version6.sh b/t/version6.sh
old mode 100755
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diff --git a/t/version7.sh b/t/version7.sh
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diff --git a/t/version8.sh b/t/version8.sh
old mode 100755
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diff --git a/t/vpath.sh b/t/vpath.sh
old mode 100755
new mode 100644
diff --git a/t/warning-groups-win-over-strictness.sh 
b/t/warning-groups-win-over-strictness.sh
old mode 100755
new mode 100644
diff --git a/t/warnings-obsolete-default.sh b/t/warnings-obsolete-default.sh
old mode 100755
new mode 100644
diff --git a/t/warnings-override.sh b/t/warnings-override.sh
old mode 100755
new mode 100644
diff --git a/t/warnings-precedence.sh b/t/warnings-precedence.sh
old mode 100755
new mode 100644
diff --git a/t/warnings-strictness-interactions.sh 
b/t/warnings-strictness-interactions.sh
old mode 100755
new mode 100644
diff --git a/t/warnings-unknown.sh b/t/warnings-unknown.sh
old mode 100755
new mode 100644
diff --git a/t/warnings-win-over-strictness.sh 
b/t/warnings-win-over-strictness.sh
old mode 100755
new mode 100644
diff --git a/t/warnopts.sh b/t/warnopts.sh
old mode 100755
new mode 100644
diff --git a/t/werror.sh b/t/werror.sh
old mode 100755
new mode 100644
diff --git a/t/werror2.sh b/t/werror2.sh
old mode 100755
new mode 100644
diff --git a/t/werror3.sh b/t/werror3.sh
old mode 100755
new mode 100644
index c6007c8..c1ec28a
--- a/t/werror3.sh
+++ b/t/werror3.sh
@@ -36,7 +36,7 @@ END
 $ACLOCAL
 
 # The issue would not manifest with threaded execution.
-unset AUTOMAKE_JOBS || :
+unset AUTOMAKE_JOBS
 AUTOMAKE_run -Wno-error
 grep 'VAR multiply defined' stderr
 
diff --git a/t/werror4.sh b/t/werror4.sh
old mode 100755
new mode 100644
diff --git a/t/whoami.sh b/t/whoami.sh
old mode 100755
new mode 100644
diff --git a/t/xsource.sh b/t/xsource.sh
old mode 100755
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diff --git a/t/yacc-auxdir.sh b/t/yacc-auxdir.sh
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diff --git a/t/yacc-basic.sh b/t/yacc-basic.sh
old mode 100755
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diff --git a/t/yacc-bison-skeleton-cxx.sh b/t/yacc-bison-skeleton-cxx.sh
old mode 100755
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diff --git a/t/yacc-bison-skeleton.sh b/t/yacc-bison-skeleton.sh
old mode 100755
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diff --git a/t/yacc-clean-cxx.sh b/t/yacc-clean-cxx.sh
old mode 100755
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diff --git a/t/yacc-clean.sh b/t/yacc-clean.sh
old mode 100755
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diff --git a/t/yacc-cxx-grepping.sh b/t/yacc-cxx-grepping.sh
old mode 100755
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diff --git a/t/yacc-cxx.sh b/t/yacc-cxx.sh
old mode 100755
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diff --git a/t/yacc-d-basic.sh b/t/yacc-d-basic.sh
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diff --git a/t/yacc-d-cxx.sh b/t/yacc-d-cxx.sh
old mode 100755
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diff --git a/t/yacc-d-vpath.sh b/t/yacc-d-vpath.sh
old mode 100755
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diff --git a/t/yacc-deleted-headers.sh b/t/yacc-deleted-headers.sh
old mode 100755
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diff --git a/t/yacc-depend.sh b/t/yacc-depend.sh
old mode 100755
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diff --git a/t/yacc-depend2.sh b/t/yacc-depend2.sh
old mode 100755
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diff --git a/t/yacc-dist-nobuild-subdir.sh b/t/yacc-dist-nobuild-subdir.sh
old mode 100755
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diff --git a/t/yacc-dist-nobuild.sh b/t/yacc-dist-nobuild.sh
old mode 100755
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diff --git a/t/yacc-dry.sh b/t/yacc-dry.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-grepping.sh b/t/yacc-grepping.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-grepping2.sh b/t/yacc-grepping2.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-headers-and-dist-pr47.sh b/t/yacc-headers-and-dist-pr47.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-line.sh b/t/yacc-line.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-misc.sh b/t/yacc-misc.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-mix-c-cxx.sh b/t/yacc-mix-c-cxx.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-nodist.sh b/t/yacc-nodist.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-pr204.sh b/t/yacc-pr204.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-subdir.sh b/t/yacc-subdir.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-vpath.sh b/t/yacc-vpath.sh
old mode 100755
new mode 100644
diff --git a/t/yacc-weirdnames.sh b/t/yacc-weirdnames.sh
old mode 100755
new mode 100644
diff --git a/t/yflags-cmdline-override.sh b/t/yflags-cmdline-override.sh
old mode 100755
new mode 100644
index 613c35c..3eea823
--- a/t/yflags-cmdline-override.sh
+++ b/t/yflags-cmdline-override.sh
@@ -20,7 +20,7 @@
 required='cc yacc'
 . test-init.sh
 
-unset YFLAGS || :
+unset YFLAGS
 
 cat >> configure.ac <<'END'
 AC_PROG_CC
diff --git a/t/yflags-conditional.sh b/t/yflags-conditional.sh
old mode 100755
new mode 100644
diff --git a/t/yflags-d-false-positives.sh b/t/yflags-d-false-positives.sh
old mode 100755
new mode 100644
diff --git a/t/yflags-force-conditional.sh b/t/yflags-force-conditional.sh
old mode 100755
new mode 100644
diff --git a/t/yflags-force-override.sh b/t/yflags-force-override.sh
old mode 100755
new mode 100644
diff --git a/t/yflags-var-expand.sh b/t/yflags-var-expand.sh
old mode 100755
new mode 100644
diff --git a/t/yflags.sh b/t/yflags.sh
old mode 100755
new mode 100644
index 8d17dc8..f8fe7a4
--- a/t/yflags.sh
+++ b/t/yflags.sh
@@ -30,7 +30,7 @@ chmod a+x fake-yacc
 
 # Remove Yacc from the environment, so that it won't interfere
 # with 'make -e' below.
-unset YACC || :
+unset YACC
 
 cat >> configure.ac <<'END'
 AC_SUBST([CC], [false])
diff --git a/t/yflags2.sh b/t/yflags2.sh
old mode 100755
new mode 100644
index 37dce3f..12eb5d7
--- a/t/yflags2.sh
+++ b/t/yflags2.sh
@@ -30,7 +30,7 @@ chmod a+x fake-yacc
 
 # Remove Yacc from the environment, so that it won't interfere
 # with 'make -e' below.
-unset YACC || :
+unset YACC
 
 cat >> configure.ac <<'END'
 AC_SUBST([CXX], [false])


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