merge-octopus: avoid dashed invocation

A long time ago, in turn a long time after introducing builtins and
moving Git's scripts to libexec/git-core/, we deprecated the invocation
of dashed commands.

The merge-octopus script is a holdover from the time before that, as it
still tries to invoke a builtin by its dashed form. Let's just not.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

git-merge-octopus.sh

@@ -100,7 +100,7 @@ do
 	if test $? -ne 0
 	then
 		gettextln "Simple merge did not work, trying automatic merge."
-		git-merge-index -o git-merge-one-file -a ||
+		git merge-index -o git-merge-one-file -a ||
 		OCTOPUS_FAILURE=1
 		next=$(git write-tree 2>/dev/null)
 	fi