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From: "David Chappaz" <david.chappaz@free.fr>
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Subject: RE: shell-command causes problems with absolute/relative paths in TAGS
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> Surely emacs must be passing slightly different arguments to ctags
> (perhaps
> slashes in a different orientation), before and after the first call to
> call-process-region ?
 
Anyway, when you use something as simple as "ctags -e -L filelist.txt" in a
shell buffer, there aren't any slashes that can change direction....

So how can this command line work before the first call to
call-process-region, and not after that ?