in diff error message, say what was being diffed

2023-09-16 16:22 James Cook:
in diff error message, say what was being diffed
- 2023-09-16 18:16 Stefan Sperling:
  in diff error message, say what was being diffed
- - 2023-09-18 01:11 James Cook:
    in diff error message, say what was being diffed
  - - 2023-09-18 06:47 Stefan Sperling:
      in diff error message, say what was being diffed
    - - 2023-09-18 14:47 James Cook:
        in diff error message, say what was being diffed
      - 2023-09-18 14:53 Stefan Sperling:
        in diff error message, say what was being diffed