Operator precedence makes it so that our mock `git log` command returns an empty log when the mock repository is not a git-svn repository.
<rdar://problem/72436380>
Created attachment 416450 [details] Patch
Created attachment 416457 [details] Patch
r=me
Created attachment 416471 [details] Patch for landing
Committed r270956: <https://trac.webkit.org/changeset/270956> All reviewed patches have been landed. Closing bug and clearing flags on attachment 416471 [details].