Quiet erroneous TSAN reports of data races in `_PySeqLock` TSAN reports a couple of data races between the compare/exchange in `_PySeqLock_LockWrite` and the non-atomic loads in `_PySeqLock_{Abandon,Unlock}Write`. This is another instance of TSAN incorrectly modeling failed compare/exchange as a write instead of a load.
Miscellaneous source files for the main Python shared library