`=' not as punctuation in sh-mode syntax table

[Frederik Fouvry]

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In GNU Emacs 21.2.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2002-08-29 on astest
configured using `configure  --host=i686-pc-linux-gnu --build=i686-pc-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-gcc --with-pop 
--with-sound'
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: de_DE@euro
  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

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

On the basis of the documentation of the syntax classes `symbol
constituent' and `punctuation character', I propose that `='
should be added to sh-mode-syntax-table as punctuation (now it is
a symbol):

(?= . "_")

The symbol constituent documentation:

===========

 - Syntax class: symbol constituent
     "Symbol constituents" (designated by `_') are the extra characters
     that are used in variable and command names along with word
     constituents.  For example, the symbol constituents class is used
     in Lisp mode to indicate that certain characters may be part of
     symbol names even though they are not part of English words.
     These characters are `$&*+-_<>'.  In standard C, the only
     non-word-constituent character that is valid in symbols is
     underscore (`_').

============

I do not think this applies to `='.

I would tend to consider `$' as punctuation as well, but the case
is less clear.

Regards,

Frederik Fouvry