fixed bug in commit message for split
diff --git a/git-subtree.sh b/git-subtree.sh
index 0a5cafa..48bc570 100755
--- a/git-subtree.sh
+++ b/git-subtree.sh
@@ -317,7 +317,7 @@
 		commit_message="Split '$dir/' into commit '$latest_new'"
 	fi
 	cat <<-EOF
-		$message
+		$commit_message
 		
 		git-subtree-dir: $dir
 		git-subtree-mainline: $latest_old