mergetools / p4mergeon commit longest_ancestor_length(): use string_list_split() (a5ccdbe)
   1diff_cmd () {
   2        "$merge_tool_path" "$LOCAL" "$REMOTE"
   3}
   4
   5merge_cmd () {
   6        touch "$BACKUP"
   7        $base_present || >"$BASE"
   8        "$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" "$MERGED"
   9        check_unchanged
  10}