user-manual: give 'git push -f' as an alternative to +master

This mirrors existing language in the description of 'git fetch'. Signed-off-by: W. Trevor King <wking@tremily.us> Signed-off-by: Junio C Hamano <gitster@pobox.com>

W. Trevor King committed Feb 17, 2013 at 19:15 UTC d1471e061657c2e437076947e0e51a3c32adfa60
1 file changed +7
Documentation/user-manual.txt
+7
@@ -2045,6 +2045,13 @@ branch name with a plus sign:
2045 $ git push ssh://yourserver.com/~you/proj.git +master
2046 -------------------------------------------------
2047
2048 +Note the addition of the `+` sign. Alternatively, you can use the
2049 +`-f` flag to force the remote update, as in:
2050 +
2051 +-------------------------------------------------
2052 +$ git push -f ssh://yourserver.com/~you/proj.git master
2053 +-------------------------------------------------
2054 +
2055 Normally whenever a branch head in a public repository is modified, it
2056 is modified to point to a descendant of the commit that it pointed to
2057 before. By forcing a push in this situation, you break that convention.