Currently, if a user tries reverting a submission, the subject for all
changes of that new revert submission will be 'Revert "Change x"'.
Also, if you try to revert that newly created submission, the subject
for all changes of that new revert submission will be 'Revert "Revert
"Change x""' (while "Change x" depends on the change).
This is clearly not good, since it doesn't scale well with 2 or more
reverts. This change makes it so that it never shows "Revert Revert" for
changes, but rather changes the convention to "Revert^N". E.g, instead
of 'Revert "Revert "Change x""' the subject is 'Revert^2 "Change x"'.
Also, the limit for length of subject was reduced by 3 to 60 max length
to account for the addition of "^NN" in the subject.
Another problem is the fact that Git's default for Git Revert is the same
as the current behavior in Gerrit ("Revert Revert Change X"). I'm trying
to get in touch with them to change the default behavior. For now, it's
okay if I make this change specifically for RevertSubmission, and keep
Revert functionality for both Git and Gerrit consistent (the cost
is that Revert Submission and Revert are not very consistent this way).
Change-Id: Id5e4b9ab20165548b24aec9b9046ff5a9a9c4e7b
100bf60712