[MERGE] Fix warning on working trees during push

[Aaron Bentley]

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James Blackwell wrote:
| On Sat, Jan 14, 2006 at 02:41:25PM -0500, Aaron Bentley wrote:
| Its just a different wording of the same warning in the same place.

So
1. "push sftp:" has never updated working trees, so 'no longer' is
inaccurate.  We did not take something away.
2. it implies that push will *never* update a working tree, which is
inaccurate.

Aaron
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