[BUG] commit message with tabulation characters

[Harald Meland]

[Aaron Bentley]

> Harald Meland wrote:
>> This is due to a typo in my control-character-escaping patch; I have
>> updated http://folk.uio.no/hmeland/software/branches/bzr/smallstuff/
>> with a fix (against the current bzr.newformat).
>
> One issue here is there are two codepaths, which had different
> behaviour, but shouldn't.  Since commit messages must be unicode
> anyway, I think it makes sense to convert the message to unicode.
> Some test cases would also be nice.

My branch has been updated to have a single codepath, and I've added a
test case to check valid XML chars aren't escaped.
-- 
Harald