tree cabd67ebe4a2433d32260d23346e2960f7f5c529
parent 4f4dcee671f263ca4a0977960405e2ebcbdc5c89
author Jonathan Amsterdam <jba@google.com> 1404557672 -0400
committer Jonathan Amsterdam <jba@google.com> 1406810418 -0400

Exposed DiffLinesToRunes and did other minor cleanup.

If clients clients use DiffLinesToRunes they can avoid an extra string to rune conversion.

Also fixed some comments and got rid of an unnecessary helper function.