Doctest cleanups (GH-95436)

* GHA: Don't hide doctest output

* Enable doctests in math.rst

* Squash warnings in nntplib.rst doctests

* Squash warning in turtle.rst doctest

* Squash warnings in whatsnew/3.2.rst doctests

* Treat warnings as errors in Doc/ doctests

1 files changed, 17 insertions, 0 deletions

diff --git a/Doc/library/nntplib.rst b/Doc/library/nntplib.rst
index 2a996e4..5aad44d 100644
--- a/Doc/library/nntplib.rst
+++ b/Doc/library/nntplib.rst
@@ -14,6 +14,23 @@
 .. deprecated:: 3.11
    The :mod:`nntplib` module is deprecated (see :pep:`594` for details).
 
+.. testsetup::
+
+   import warnings
+   with warnings.catch_warnings():
+       warnings.simplefilter('ignore', category=DeprecationWarning)
+       import nntplib
+
+.. testcleanup::
+
+   try:
+       s.quit()
+   except NameError:
+       pass
+   import sys
+   # Force a warning if any other file imports nntplib
+   sys.modules.pop('nntplib')
+
 --------------
 
 This module defines the class :class:`NNTP` which implements the client side of