bug fixes to emacs notmuch-tag-completion function

[Mark Walters]

All three of these look good to me and include some genuine bug
fixes. +1

Best wishes

Mark

On Mon, 09 Apr 2012, Jameson Graef Rollins <jrollins at finestructure.net> wrote:
> I had originally included this fixes as part of a more involved series
> to fix up tagging functions [0].  However, these are actually bug
> fixes that stand alone and should not be bogged down in a series
> that's likely going to take a while to come to fruition.  The changes
> here are pretty trivial, so hopefully they can get pushed quickly and
> I'll rework the rest of tagging fix up series on top of them.
>
> jamie.
>
> [0] id:"1333354853-25729-1-git-send-email-jrollins at finestructure.net"
>
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