mergetools / kompareon commit test_must_be_empty: make sure the file exists, not just empty (11395a3)
   1can_merge () {
   2        return 1
   3}
   4
   5diff_cmd () {
   6        "$merge_tool_path" "$LOCAL" "$REMOTE"
   7}
   8
   9exit_code_trustable () {
  10        true
  11}