bug#20325: convert "fixes:debbugs:123" in log to (Bug#123) in ChangeLog

[Stefan Monnier]

>> I think we shouldn't look at recent commits but at all commits in
>> the repository, since we want to reduce variation overall.
> Then the counts are closer.  If one looks at the current 1,021,440-line
> output of 'git log', 3515 lines match the regular expression
> 'bug#[0-9][0-9][0-9]' and 2906 lines match 'debbugs:[0-9][0-9][0-9]',
> ignoring case for both searches.

No need to count.  The convention was very clear and followed fairly
consistently: use (bug#NNN) in the ChangeLog, which gets turned into
"Fixes: debbugs:NNNN" in the *VC-Log* buffer (and was then turned into
a "--fixes debbugs:NNNN" argument to bzr which finally turned it into
a "Fixes: URL" message in the "bzr log" output).

Some/many (Bug#NNN) ended up in the commit log, and IIUC Eric's
conversion to Git turned Bzr's internal "Fixes" into "Fixes: debbugs:NNNN".

So, AFAIK, in terms of "pseudo-header syntax", the only thing we've used
consistently is "Fixes: debbugs:NNNN".


        Stefan