Summary:
The postincoming checks prints out advice of the following forms:
* `(run 'hg heads' to see heads)`
* `(run 'hg heads' to see heads, 'hg merge' to merge)`
* `(run 'hg heads .' to see heads, 'hg merge' to merge)`
* `(run 'hg update' to get a working copy)`
This advice is no longer useful, so remove it.
Reviewed By: DurhamG, farnz
Differential Revision: D15317185
fbshipit-source-id: 50ba576406c96715fa058399da53462be9b7a3bf
Summary: This is caused by D13516212, and not covered by tests.
Reviewed By: DurhamG, StanislavGlebik
Differential Revision: D14025817
fbshipit-source-id: 8a529085c40c5d2ae17ccf3de1ccea22c8d7dbd2