The mailmap format parsed by the "git shortlog" command allows for
matching mailmap entries with no email address. This is admittedly an
edge case, because most Git commits will have an email address
associated with them as well as a name, but technically the address
isn't required, and "git shortlog" accommodates that in its mailmap
format. This commit teaches git-filter-repo to do the same thing.
Signed-off-by: Karl Lenz <xorangekiller@gmail.com>
