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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: subtle problem of font-lock in *compilation* buffer
Date: Fri, 15 Sep 2006 10:29:41 -0400
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    Sadly, it seems to be becoming more and more common for people to use spaces
    in their file/directory names.

We can try to find clever ways to distinguish, as you've done here.
(Thanks for thinking of it.)

Despite the best we can do, there will still be some names that could
be confused with parts of compiler messages, such that we can't
distinguish.  When that happens, we have to parse the compiler
messages properly.  If someone actually uses a name that causes
confusion, we have to tell him "Don't use names like that."