[Automake-NG] [FYI] Merge branch 'master' into ng/master

[Stefano Lattarini]

commit cf4f853ca2695a9e3cd35836cd610279fb3a6864
Merge: ffc53e6 3b83966
Author: Stefano Lattarini <address@hidden>
Date:   Fri Jun 22 20:05:11 2012 +0200

    Merge branch 'master' into ng/master

    * master:
      tests: prefer using 'is_newest' over 'ls -t' hacks
      tests: implement is_newest as an auxiliary script, not shell function
      tests: fix some spurious failures in VPATH setup
      tests: work in VPATH setup again
      tests: automatic re-execution works for non-POSIX shells too
      tests: use more POSIX shell features our test scripts
      docs: avoid failures with development version of Texinfo (4.13.90)
      typofix: s/test derivers/test drivers/ in check.am comments
      typofix: s/env/even/ in comments in GNUmakefile

    Signed-off-by: Stefano Lattarini <address@hidden>