Various bugs in snerp (pointed out by Git core team)

[avar]

See: http://lists-archives.org/git/716433-add-option-to-git-commit-to-allow-empty-log-messages.html

There's a lot of small things that can be fixed there.

Just noting it here for future reference.

[rcaputo]

Thanks! Would be forgotten otherwise.

My blanket response after reading some of the concerns is "That's why snerp requires the --experimental flag." But yeah, the raised issues need to be handled before --experimental can go away.