cpython/Misc/NEWS.d/next/Core and Builtins/2024-06-14-22-02-25.gh-issue-113993.MiA0vX.rst

Strings interned with :func:`sys.intern` are again garbage-collected when no
longer used, as per the documentation. Strings interned with the C function
:c:func:`PyUnicode_InternInPlace` are still immortal. Internals of the
string interning mechanism have been changed. This may affect performance
and identities of :class:`str` objects.