Formatting only changes. Converting tabs to spaces in git macros.

Refs #8474
git checkbuild now publishes any changes from the given branch

This should avoid branches not turning up when testing is started on them
and also avoid partial branches being tested when further updates weren't
pushed to the remote.
Refs #8474
Merge remote-tracking branch 'origin/feature/8474_git_publish_with_checkbuild'