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https://reviews.llvm.org/D71565 intends to update llvm/utils/update_cc_test_checks.py to work with Python 2. In the original review, I suggested that we don't add Python 2 compatibility for new features because Python 2.7 is retiring and some Linux distributions are even deprecating/removing Python 2 support. My feeling is: If some utilities do not support Python 2, we should probably not