bug#17757: 24.4.50; Whitespace changes break signature mark

[James Cloos]

The recent changes to whitespace breaks entering the signature
separation mark in Message mode.

The normal pattern of typing dash dash space return used to result in a
proper string, but now the space gets deleted.

Whitespace which is explicitly typed by the user at the end of a line
and followed by an explicit newline should not get deleted.



In GNU Emacs 24.4.50.1 (x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2014-06-03 on carbon.jhcloos.org
Repository revision: eggert@cs.ucla.edu-20140603200808-63zhdvayx2g15ppc
Windowing system distributor `The X.Org Foundation', version 11.0.11599900
System Description:     Gentoo Base System release 2.2

Configured using:
 `configure --prefix=/usr --build=x86_64-pc-linux-gnu
 --host=x86_64-pc-linux-gnu --mandir=/usr/share/man
 --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc
 --localstatedir=/var/lib --libdir=/usr/lib64 --disable-silent-rules
 --disable-dependency-tracking --program-suffix=-emacs-24-vcs
 --infodir=/usr/share/info/emacs-24-vcs --localstatedir=/var
 --enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp
 --with-gameuser=games --without-compress-install
 --with-file-notification=inotify --enable-acl --with-dbus --with-gnutls
 --with-gpm --without-hesiod --with-kerberos --with-kerberos5
 --with-xml2 --without-selinux --without-wide-int --with-zlib
 --with-sound=alsa --with-x --without-ns --without-gconf
 --without-gsettings --with-toolkit-scroll-bars --with-gif --with-jpeg
 --with-png --with-rsvg --with-tiff --with-xpm --with-imagemagick
 --with-xft --with-libotf --with-m17n-flt --with-x-toolkit=lucid
 --with-xaw3d GENTOO_PACKAGE=app-editors/emacs-vcs-24.4.9999
 EBZR_BRANCH=trunk EBZR_REVNO=117251 'CFLAGS=-pipe -O2 -g3
 -march=native' CPPFLAGS= 'LDFLAGS=-Wl,-O1 -Wl,--as-needed''

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS NOTIFY ACL
GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB

Important settings:
  value of $LC_COLLATE: C
  value of $LC_CTYPE: en_US.UTF-8
  value of $LC_TIME: C
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  diff-auto-refine-mode: t
  gnus-undo-mode: t
  show-paren-mode: t
  display-time-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t

Recent input:
o s . c o m SPC d o w n M-> C-c RET C-p C-s C-n I ' 
m SPC w o r k i n g SPC w i t h SPC m y SPC v e n d 
o r SPC t o SPC g e t SPC i t SPC b a c k SPC u p . 
<return> <return> I SPC d o SPC n o t SPC n o <backspace> 
<backspace> k n o w SPC w h e t h e r SPC I ' l l SPC 
n e e d SPC t o SPC r e - i n s t a l l SPC a n d SPC 
<backspace> <backspace> <backspace> <backspace> C-a 
M-f M-f M-f SPC y e t C-e <backspace> . <return> <return> 
I ' l l SPC s e n d SPC a n SPC u p d a t e SPC w h 
e n SPC C-a C-k C-p C-p C-p C-p <return> <return> C-p 
C-p M y SPC n o d e , SPC k e y s . j h c l o o s . 
c o m , SPC w e n t SPC d o w n SPC t i s <backspace> 
<backspace> h i s SPC m o r n i n g SPC a n SPC r <backspace> 
<backspace> d SPC r e g u <backspace> <backspace> f 
i u s <backspace> <backspace> <backspace> u s e s SPC 
t o SPC b o o t . C-n C-n C-n C-n C-n C-n C-n C-n C-n 
- J i m C <return> - - SPC <return> C-x i s i g <return> 
C-p C-e SPC C-n C-n C-n C-c C-c M-x r e p o <tab> r 
<tab> <return>

Recent messages:
Mark set
End of buffer
Mark set
Sending...
Mark set [3 times]
Sending via mail...
Mark set
Wrote /home/cloos/Mail/archive/mail/2014/06/61
Sending...done
Making completion list...

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/usr/share/emacs/site-lisp/gnus/gnus-int hides 
/usr/share/emacs/24.4.50/lisp/gnus/gnus-int
/usr/share/emacs/site-lisp/gnus/gnus-srvr hides 
/usr/share/emacs/24.4.50/lisp/gnus/gnus-srvr
/usr/share/emacs/site-lisp/gnus/gnus hides 
/usr/share/emacs/24.4.50/lisp/gnus/gnus
/usr/share/emacs/site-lisp/gnus/gnus-bcklg hides 
/usr/share/emacs/24.4.50/lisp/gnus/gnus-bcklg
/usr/share/emacs/site-lisp/gnus/gnus-dup hides 
/usr/share/emacs/24.4.50/lisp/gnus/gnus-dup
/usr/share/emacs/site-lisp/gnus/rfc1843 hides 
/usr/share/emacs/24.4.50/lisp/gnus/rfc1843
/usr/share/emacs/site-lisp/gnus/gnus-demon hides 
/usr/share/emacs/24.4.50/lisp/gnus/gnus-demon
/usr/share/emacs/site-lisp/gnus/deuglify hides 
/usr/share/emacs/24.4.50/lisp/gnus/deuglify
/usr/share/emacs/site-lisp/gnus/gnus-cite hides 
/usr/share/emacs/24.4.50/lisp/gnus/gnus-cite
/usr/share/emacs/site-lisp/gnus/plstore hides 
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/usr/share/emacs/site-lisp/gnus/auth-source hides 
/usr/share/emacs/24.4.50/lisp/gnus/auth-source
/usr/share/emacs/site-lisp/gnus/nndir hides 
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/usr/share/emacs/site-lisp/gnus/rfc2231 hides 
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/usr/share/emacs/site-lisp/gnus/nnrss hides 
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/usr/share/emacs/site-lisp/gnus/smiley hides 
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/usr/share/emacs/site-lisp/gnus/parse-time hides 
/usr/share/emacs/24.4.50/lisp/calendar/parse-time

Features:
(shadow emacsbug canlock boxquote rect url-auth url-queue rfc1345 quail
help-mode log-edit pcvs-util add-log vc vc-git org-element org-rmail
org-mhe org-irc org-info org-gnus org-bibtex bibtex org-bbdb org-w3m org
org-macro org-footnote org-pcomplete org-list org-faces org-entities
noutline outline org-version ob-emacs-lisp ob ob-tangle org-src ob-ref
ob-lob ob-table ob-keys ob-exp ob-comint ob-core ob-eval org-compat
org-macs org-loaddefs find-func cal-menu calendar cal-loaddefs diff-mode
thai-util thai-word sendmail ispell supercite easy-mmode regi gnus-fun
nnir gnus-dup nndoc vc-dispatcher vc-rcs sh-script smie server sgml-mode
gnus-html xml url-cache mm-url info shr-color color shr epg flow-fill qp
mm-archive sort gnus-cite mail-extr gnus-async gnus-bcklg face-remap
quilt gnus-kill gnus-ml disp-table repeat misearch multi-isearch nndraft
nnmh nnml utf-7 nnmaildir nnfolder network-stream starttls gnus-agent
gnus-srvr gnus-score score-mode nnvirtual gnus-msg gnus-art mm-uu
mml2015 epg-config mm-view mml-smime smime dig nntp gnus-cache gnus-sum
gnus-group gnus-undo gnus-start gnus-cloud nnimap nnmail mail-source tls
utf7 netrc nnoo parse-time gnus-spec gnus-int gnus-range message idna
dired rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse
rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev gmm-utils mailheader
gnus-win gnus gnus-ems gnus-compat url url-proxy url-privacy url-expand
url-methods url-history url-cookie url-domsuf url-util url-parse
auth-source eieio byte-opt bytecomp byte-compile cconv eieio-core
password-cache url-vars mailcap nnheader gnus-util mail-utils mm-util
mail-prsvr wid-edit jka-compr paren time delsel cus-start cus-load
mule-util elscreen jhc-backend-xft-fonts cl-macs gnus-load w3m-load
preview-latex scala-mode-auto mmm-auto mmm-vars mmm-compat cl gv edmacro
kmacro cl-loaddefs cl-lib imenu ido ess-toolbar ess-mouse mouseme
thingatpt browse-url ess-menu ess-swv ess-noweb ess-noweb-font-lock-mode
ess-bugs-l essd-els ess-sas-d ess-sas-l ess-sas-a shell pcomplete
ess-sta-d ess-sta-l cc-vars cc-defs make-regexp ess-sp6-d ess-sp3-d
ess-julia ess-r-d compile ess-tracebug format-spec ess-roxy advice
hideshow ess-help ess-developer ess-r-args eldoc help-fns ess-s-l ess
ess-inf comint ansi-color ring ess-mode ess-noweb-mode ess-utils
ess-custom executable easymenu ess-compat ess-site bbdb-autoloads bbdb
timezone tex-site auto-loads time-date tooltip electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd
fontset image regexp-opt fringe tabulated-list newcomment lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
dbusbind inotify dynamic-setting font-render-setting x-toolkit x
multi-tty emacs)

Memory information:
((conses 16 3080372 573700)
 (symbols 48 249104 133)
 (miscs 40 4671 12978)
 (strings 32 414723 361331)
 (string-bytes 1 12996170)
 (vectors 16 54399)
 (vector-slots 8 1943797 220265)
 (floats 8 566 1557)
 (intervals 56 72583 7292)
 (buffers 960 1800)
 (heap 1024 328515 100850))