Remove parentheses from single unnamed lambda parameters#1054
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When `ReplaceUnusedVariablesWithUnderscore` renames a single parenthesized lambda parameter to `_`, also strip the parentheses so `(_) -> ...` becomes `_ -> ...`.
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Summary
ReplaceUnusedVariablesWithUnderscorerenames a single parenthesized lambda parameter to_, it now also strips the parentheses so(_) -> ...becomes_ -> ...renameVariableIfUnusedInContextnow returns a boolean to signal whether a rename will occurreplaceUnusedParenthesizedLambdaParametertest covering this caseTest plan
(item) -> "NODATA"becomes_ -> "NODATA"(_, _) -> ...retain parentheses