This change is strictly about 'git merge-ours -h' without
any other options and arguments.
This change cannot break compatibility since merge drivers are
always passed '--', among other arguments.
Any usage string for this command is a lie, since it ignored its
arguments until now. Still, it makes sense to let the user know
the expected usage when asked.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Except that this fixes a longstanding corner case bug by
tightening the way underlying diff-index command is run, it is
functionally equivalent to the scripted version.
Signed-off-by: Thomas Harning Jr <harningt@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
