git-status: do not mark unmerged paths as committable.

An unmerged path appears as both "Updated but not checked in" list,
and "Changed but not updated" list.  We are not going to commit that
path until it is resolved, so remove it from the former list.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git-status.sh

@@ -41,7 +41,7 @@ git-update-index -q --unmerged --refresh || exit
 
 if GIT_DIR="$GIT_DIR" git-rev-parse --verify HEAD >/dev/null 2>&1
 then
-	git-diff-index -M --cached --name-status HEAD |
+	git-diff-index -M --cached --name-status --diff-filter=MDTCRA HEAD |
 	sed -e '
 		s/\\/\\\\/g
 		s/ /\\ /g