mergetools / smergeon commit list-objects-filter: encapsulate filter components (9430147)
   1diff_cmd () {
   2        "$merge_tool_path" mergetool "$LOCAL" "$REMOTE" -o "$MERGED"
   3}
   4
   5merge_cmd () {
   6        if $base_present
   7        then
   8                "$merge_tool_path" mergetool "$BASE" "$LOCAL" "$REMOTE" -o "$MERGED"
   9        else
  10                "$merge_tool_path" mergetool "$LOCAL" "$REMOTE" -o "$MERGED"
  11        fi
  12}