commands: make the warning message for "patch --partial" translatable
This patch makes the warning message for "patch --partial"
translatable: this message was introduced by bee0e1cffdd3, and there is
no reason to prevent this from being translatable.
To run the tests, do:cd tests/python run-tests.pySee http://mercurial.selenic.com/wiki/WritingTests formore information on writing tests.