facebook/arcanist — pull request #164 by txchen (2014-05-09 02:41:08+00:00)
Title: fix base rule arc:upstream in windows environment

arcanist is using
rev-parse --abbrev-ref --symbolic-full-name '@{upstream}'
to get the upstream branch.

however, unfortunately, single quotation is not working in windows
it would return error " fatal: No such branch: ''' "

change it to double quote can fix the issue.