Add 15 new tests in two classes: - TestRmFalsePositiveFix (8 tests): verify filenames starting with 'r' (readme.txt, requirements.txt, report.csv, etc.) are NOT falsely flagged as 'recursive delete' - TestRmRecursiveFlagVariants (7 tests): verify all recursive delete flag styles (-r, -rf, -rfv, -fr, -irf, --recursive, sudo rm -rf) are still correctly caught All 29 tests pass (14 existing + 15 new).