bug#13006: recognizing compressed files with arbitrary names

[Andreas Schwab]

karl@freefriends.org (Karl Berry) writes:

> $ echo foo | gzip >/tmp/foo.gz.~1~
> $ emacs --no-site-file --no-init /tmp/foo.gz.~1~
>
> And observe binary junk instead of text.  (This is with 24.2.)

This is a regression from Emacs 23.  It should disregard the backup
suffix when matching the extension.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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