[MERGE] Make pull --quiet more quiet. Fixes #185907.

[John Arbash Meinel]

John Arbash Meinel has voted approve.
Status is now: Semi-approved
Comment:
The only thing I would add to your test is to check the last revision of 
tree_b, to make sure that the pull actually did something, even though 
it didn't print anything to the screen.

You could use something like:

revision_id = tree_a.commit()
...

self.assertEqual(revision_id, tree_b.last_revision())


For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C1201557101.7500.43.camel%40flash%3E