gh-104263: Rely on Py_NAN and introduce Py_INFINITY#104202

Merged

mdickinson merged 10 commits intopython:mainfrom seberg:maint-double-nan

May 10, 2023

+44-198

Commits on May 5, 2023

MAINT: Rely on Py_NAN and Py_HUGE_VAL being correctly defined
seberg
committed

Commits on May 7, 2023

Commits on May 9, 2023

Rely on C99 NAN being defined and ensure NaN sign for creation functions
seberg
committed