[MERGE] Note number of revisions being bundled

[Aaron Bentley]

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John Arbash Meinel wrote:
> John Arbash Meinel has voted tweak.
> Status is now: Conditionally approved
> Comment:
> note()ing it seems ok. I'm not sure if it is the best way to test for it
> (something like that seems more like a UI test that would be in
> blackbox/* rather than a direct test.)

Before merging, I changed it to a blackbox test.

> I'll also note that if the value is 0, I would still thing a "refusing
> to create an empty bundle" would be a more appropriate result.

I don't agree-- empty merges are obviously wrong, but empty bundles just
mean that the recommended merge involves revisions already present in
the upstream.  For example, a reverse merge would legimately have an
empty bundle.

Aaron
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