Tighten up regex for detecting GoToFile buffer
Tighten up regex for detecting GoToFile buffer

We can't use a simple equality comparison because the actual buffer name
will probably be something like "/my/current/working/directory/GoToFile"
but this is still a slight improvement.

I'm not tightening it up even further (eg. by trying to match
"/GoToFile") because I don't want to run into trouble on Windows, where
the path separator may be different.

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

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