v3.14.6
[3.14] gh-143008: Fix race re-initializing TextIOWrapper (GH-151203) (#151226)
[3.14] gh-150285: Fix too long docstrings in the io module (GH-150287) (GH-150458)
gh-117151: IO performance improvement, increase io.DEFAULT_BUFFER_SIZE to 128k (GH-118144)
[3.14] gh-149816: add missing critical section on self in buffered_iternext (GH-150295) (#150306)
[3.14] gh-149046: fix: correctly handle `str` subclasses in `io.StringIO` (GH-149047) (#150707)