missing links in *Help*

[Tom Tromey]

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the address@hidden mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:


1. Run an Emacs using a window system (I'm using X)
2. Visit a patch file; make sure it is in diff-mode
3. C-h b
4. Move your mouse around the *Help* buffer.
   Note that diff-unified->context and diff-context->unified
   do not highlight -- you cannot click on these to go to the
   appropriate help text.  However, you can click on most of the other
   commands.


If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/usr/share/emacs/22.0.990/etc/DEBUG for instructions.


In GNU Emacs 22.0.990.1 (i386-koji-linux-gnu, GTK+ Version 2.10.11)
 of 2007-05-23 on xenbuilder3.fedora.phx.redhat.com
Windowing system distributor `The X.Org Foundation', version 11.0.70101000
configured using `configure  '--build=i386-koji-linux-gnu' 
'--host=i386-koji-linux-gnu' '--target=i386-redhat-linux-gnu' 
'--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' 
'--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' 
'--includedir=/usr/include' '--libdir=/usr/lib' '--libexecdir=/usr/libexec' 
'--localstatedir=/var' '--sharedstatedir=/usr/com' '--mandir=/usr/share/man' 
'--infodir=/usr/share/info' '--with-pop' '--with-sound' '--with-gtk' 
'build_alias=i386-koji-linux-gnu' 'host_alias=i386-koji-linux-gnu' 
'target_alias=i386-redhat-linux-gnu' 'CFLAGS=-DMAIL_USE_LOCKF 
-DSYSTEM_PURESIZE_EXTRA=16777216 -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 
-fexceptions --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic 
-fasynchronous-unwind-tables''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  flyspell-mode: t
  eldoc-mode: t
  erc-services-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-p C-p C-p C-w C-x C-s M-x d i f f - m o <tab> <tab> 
<M-backspace> <backspace> <tab> <tab> C-g C-h f d i 
f f <return> C-x 1 <switch-frame> <switch-frame> <switch-frame> 
C-z o x C-/ M-x d i f f - m o d e <return> C-v C-v 
C-v C-h b C-x o C-x 1 C-s a p p l y C-s C-r C-r C-a 
<help-echo> <down-mouse-2> <mouse-2> <help-echo> <down-mouse-2> 
<mouse-2> <help-echo> <down-mouse-2> <mouse-2> <switch-frame> 
C-x C-f <M-backspace> <M-backspace> <M-backspace> E 
m <tab> e m <tab> d i f <tab> <M-backspace> l i s <tab> 
/ d i f <tab> <tab> <tab> - m <tab> <return> C-s b 
u f e r C-b C-b f C-s C-s C-b C-b f C-s C-s C-b C-b 
f M-% b u f e r <return> b u f f e r <return> C-u C-SPC 
C-a C-u C-n C-c a T y p o . <M-backspace> F i x SPC 
t y p o C-c b C-u C-SPC C-c a l i M-/ . C-c C-g <M-backspace> 
l i k M-/ . <backspace> w M-/ . C-c b C-u C-SPC C-c 
a l i k M-/ . C-x SPC C-x s SPC SPC n C-z o <help-echo> 
<down-mouse-1> <mouse-2> <help-echo> <down-mouse-5> 
<mouse-5> <help-echo> <down-mouse-2> <mouse-2> <help-echo> 
<down-mouse-1> <mouse-2> <help-echo> <switch-frame> 
<help-echo> C-x C-f d i f f f - m o C-u C-b C-b C-d 
C-e C-e <tab> <return> C-s d i f f - c o n t e x t 
- C-w C-s C-s C-s C-r C-r C-f C-h f <return> <switch-frame> 
<switch-frame> M-b C-s C-w C-w C-w C-s C-w C-s C-s 
C-s C-s C-s C-s C-s C-s C-a <switch-frame> <help-echo> 
<down-mouse-1> <mouse-2> <help-echo> <switch-frame> 
<switch-frame> <help-echo> <switch-frame> M-x r e p 
o r t - e m <tab> <return>

Recent messages:
Saving file /home/tromey/gnu/Emacs/emacs/lisp/ChangeLog...
Loading copyright...done
Wrote /home/tromey/gnu/Emacs/emacs/lisp/ChangeLog
Saving file /home/tromey/gnu/Emacs/emacs/lisp/diff-mode.el...
Replace GPL version by 2? (y or n) 
Wrote /home/tromey/gnu/Emacs/emacs/lisp/diff-mode.el
Mark saved where search started
Type C-x 1 to remove help window.  
Mark saved where search started
Loading emacsbug...done