[MERGE] add stop_rule to Branch.iter_merge_sorted_revisions()

[Ian Clatworthy]

Ian Clatworthy wrote:
> I wrote on 25/01/2009:
>> It looks like 'inclusive' isn't flexible enough. I'm going to add a
>> parameter called (something like) stop_rule with values of:
>>
>> * "exclude" - leave the stop revision out of the result
>> * "include" - put the stop revision in the result
>> * "with-merges" - put the stop revision and nested merges in the result.
> 
> Attached.

An updated version with a bug fix and matching tests covering the single
revision edge case.

Ian C.
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