multi-occur-by-filename-regexp docstring misleading

[Ryan Yeske]

Symptoms:

(defun multi-occur-by-filename-regexp (bufregexp regexp &optional nlines)
  "Show all lines matching REGEXP in buffers named by BUFREGEXP.
See also `multi-occur'."

The docstring makes it seem like it will search all buffers matching
REGEXP, but it only looks at buffers for which there is a
(buffer-file-name).  This should be documented more clearly.  

It would be nice if there was a variant of multi-occur to search any
buffer names.  I ran into this bug looking wanting to find instances
of a word in irc buffers, which all start with a ?# character.  There
is no easy way to do this.  It would also be nice to be able to have a
straightforward way to run occur on all emacs buffers (I know the text
FOO is in some buffer I have open somewhere, but I cant rememeber
where!)

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
/home/rcyeske/contrib/emacs/etc/DEBUG for instructions.


In GNU Emacs 22.0.50.2 (i386-unknown-openbsd3.6)
 of 2006-01-20 on cut.bc.hsia.telus.net
configured using `configure '--without-x''

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: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  t: t
  temperature-mode: t
  rcirc-track-mode: t
  display-time-mode: t
  iswitchb-mode: t
  auto-image-file-mode: t
  show-paren-mode: t
  auto-compression-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
  line-number-mode: t

Recent input:
a c s RET h m m m DEL SPC DEL , SPC t h e r e s SPC 
m u i l t DEL DEL DEL l t i - o c c u r - b y - f i 
l e n a m e - r e g e x p , SPC C-h f m u l t i - o 
c TAB - b TAB RET C-a C-k C-x o TAB RET C-x 1 ESC x 
r e p o r t - e m a c s - b u g RET

Recent messages:
Making completion list...
Quit
Making completion list...
Type C-x 1 to remove help window.  
Quit
Searched 8 buffers; 3 matches for `rcirc'
Quit
Type M-x switch-to-buffer-other-window RET to restore the other window.  
mouse-2, RET: find function's definition
Loading emacsbug (compiled; note, source file is newer)...done