fix: match GNU error format for unrecognized options#180
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Ryujiyasu wants to merge 2 commits intouutils:mainfrom
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fix: match GNU error format for unrecognized options#180Ryujiyasu wants to merge 2 commits intouutils:mainfrom
Ryujiyasu wants to merge 2 commits intouutils:mainfrom
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GunterSchmidt
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Feb 28, 2026
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Use single quotes and remove colon to match GNU diff/cmp output: `unrecognized option '--foobar'` instead of `unrecognized option: "--foobar"` Also use `contains` instead of `starts_with` in the integration test to handle the command prefix (e.g. `cmp: unrecognized option ...`). Follow-up to uutils#178 / uutils#179. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Follow-up to #178 / #179. Adjusts the unrecognized option error message to match the actual GNU diff/cmp output format:
unrecognized option'--foobar'instead of"--foobar")containsinstead ofstarts_within integration test to handle the command prefix (e.g.cmp: unrecognized option ...)Before:
unrecognized option: "--foobar"After:
unrecognized option '--foobar'As pointed out by @GunterSchmidt in #178 (comment).
Test plan
cargo test— all 125 unit tests and 21 integration tests passdiffutils diff --foobaroutputsunrecognized option '--foobar'diffutils cmp --foobaroutputsunrecognized option '--foobar'