Re: `file-relative-name' for compressed files

[Richard Stallman]

    No. Your change does *not* work for remote compressed files:

       (file-relative-name "/bar:/a/b/c/foo.gz" "/bar:/a/b/c/")
       => "/ssh:bar:/a/b/c/foo.gz"

That case works in the latest sources.  It fails in older
sources where file-remote-p returns nil for "/ssh:bar:/a/b/c/foo.gz",
which is a bug that was recently fixed.