On my system whenever I run the tests without specifying an initial branch name,
I get a lot of messages about setting the default branch name globally. This is
just noise for these tests, so this specifies a branch name manually to make it
go away.
The name ‘gac-test’ was chosen to make it clear that we're dealing with a
repository created specifically for ‘git-auto-commit-mode’ in case somehow a
repository gets left behind.
If the way to get the commit message ever changes, or needs more
post-processing, it's easy to be able to change it in just one place instead of
everywhere.
I’d like to rename other functions as well, but especially with the commands and
variables I’m afraid of breaking configurations. I don’t have to worry about
that so much yet with the test functions.
