Restore one-sided return_input options in overlap#240
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overlap() historically accepted 1/"1"/"left" and 2/"2"/"right" to return only one side's columns, but a refactor reduced return_input to a plain truthiness check, so every non-False value returned both sides. Restore the documented values, raise ValueError on unsupported input, and add tests. Closes open2c#197
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Closes #197.
overlap(..., return_input=...)used to accept1/"1"/"left"to return only df1's columns and2/"2"/"right"to return only df2's, but a refactor reducedreturn_inputto a plain truthiness check, so any non-Falsevalue silently returned both sides. This restores the documented options and makes unsupported values raise instead of failing silently.Changes:
overlapresolvesreturn_inputinto left/right flags and raisesValueErrorfor values outside{True, False, 1, 2, "1", "2", "left", "right"}.test_overlap_return_inputcovering both / neither / left-only / right-only and the error case.pytest tests/test_ops.pypasses (17 tests).