bug#1973: Bug in simple.el (Emacs version 22.2.1)

[Sebastian Tennant]

Quoth Sebastian Tennant <sebyte@smolny.plus.com>:
> Actually, this updated patch (attached) is what's required to fix the
> problem here.
>
> It explicitly puts the buffer in comint-mode.  (My last patch neglected
> to do this).

Correction.  The patch does not requre a call to comint-mode.  The
problem is stranger still.

With the first patch I provided (no comint-mode call) applied:

 $ emacs -Q

 M-! apt-get update &
 =| ^Ms abound
 
 M-x load-library RET simple.el RET
 => t
 M-! apt-get update &
 =| no ^Ms (in Shell mode)

I removed simple.elc before performing the above test so that's not the
problem.

With the unpatched simple.el in place, loading it manually a second time
does not fix the problem so my patch (with or without the call to
comint-mode) is still required.

Sebastian
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