Re: [PATCH v2 00/18] Add `branch-diff`, a `tbdiff` lookalike

2) Your completion commands for branch-diff will only complete one
revision range, not two.  e.g.
    git branch-diff origin/master..my-topic@{2} origin/master..my-top<tab>
won't complete "my-topic" as I'd expect.

It does complete two revision ranges, but if you want to look at
reflogs, then you must escape the opening curly brace.  I'm not sure
why, but apparently after the unescaped '{' Bash thinks that it's a
new command, and doesn't even call our completion functions anymore.
It's not specific to the completion of 'branch-diff', or even to our
completion script.  I don't think we can do anything about it.