gh-104683: Modernise Tools/clinic/ (#104684)

- Make some string interpolations more readable using f-strings or
  explicit parametrisation
- Remove unneeded open() mode specifiers

Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>

Alex Waygood committed 2y ago

19dd5aa89af4cc3150ed87f039601f87bc419be7

Parent: 30488fa

Committed by GitHub <noreply@github.com> on 5/20/2023, 8:16:49 PM