Otherwise acronyms and such would fail the lint, and it doesn't make any
sense to enforce it here. Also make sure that the length of the word is
greater than 1 to avoid something like "foo: A blah blah" from passing.
The default revert will always add 9 extra characters which means it
could go over the 72 character soft limit if the commit being reverted
has a long subject. We won't fuss about this so just shut up the lint in
this case.