cpython

Simplify and speed-up an itertools recipe (gh-127848)

gh-127740: Add some more tests for earlier PR #127756 (#127818)

gh-127146: Some expected failures in Emscripten time tests (#127843)

gh-115999: Specialize `CALL_KW` in free-threaded builds (#127713)

gh-111609: Test `end_offset` in SyntaxError subclass (#127830)