fix: Ignore empty error codes from 'type: ignore' #20052
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Would be a nice place for a walrus operator. |
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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type: ignorecomments with leading, trailing, orrepeated commas could lead to empty strings being parsed as valid
error codes.
This resulted in incorrect
[unused-ignore]warnings when using the--warn-unused-ignoresflag, as the empty code '' was considereda valid but unused ignore rule.
This commit improves the parsing logic to filter out any empty strings
that result from splitting the error codes.
fixes #20038