usage: fedpkg verify-files [-h]

Locally run 'rpmbuild -bl' to verify the spec file's %files sections. This is
useful after a successful run of 'fedpkg install' or after a 'fedpkg local'
run which failed due to %files list inaccuracies.

I decided to emulate git here and not default to a rebase.

This feeds both command --help and the man page.  Formatting is a little
odd.  The help = on the parser itself cannot span multiple lines with \.
It'll look fine in --help but not in the man page.  Multiple strings
need to be used instead.  The description argument can span multiple
lines with \ just fine though.