Nicholas Nethercote 49c0b33862 Change message type in bug functions.
From `impl Into<DiagnosticMessage>` to `impl Into<Cow<'static, str>>`.

Because these functions don't produce user-facing output and we don't
want their strings to be translated.
2024-03-05 17:11:42 +11:00
..
2024-03-05 17:11:42 +11:00