goto-address-mail-regexp: add =

[Frederik Fouvry]

Symptoms:

In goto-addr.el, the variable goto-address-mail-regexp should also
contain a `=' in the part before `@'.

(I do not know if this value is set somewhere else as well, or if a
normalisation takes place: when I inspected the value before I made
the change, a character class was used ([:alnum:]).  After the
evaluating the change, it contained the ranges a-zA-Z0-9 instead of
the classes.  The functionality is of course the same, but it makes me
wary.)


In GNU Emacs 21.3.50.33 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2004-12-22 on cc.at.coli.uni-sb.de
Distributor `The XFree86 Project, Inc', version 11.0.40201000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: POSIX
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: address@hidden
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t