Skipping doctest for python 3.13 in nox (#84)

noxfile.py

@@ -1,3 +1,4 @@
+import sys
 import nox
 
 nox.options.stop_on_first_error = True
@@ -27,12 +28,15 @@ def test(session):
 
 @nox.session
 def doctest(session):
+    if sys.version_info.major == 3 and sys.version_info.minor == 13:
+        print("Skipping doctest for python 3.13, see https://github.com/twmr/pytest-sphinx/issues/67")
+        return
     session.install("-r", "requirements.txt")
     session.install("-r", "requirements_doc.txt")
     session.run("pytest", "doc", "--doctest-glob=*.rst", "--doctest-modules")
 
 
-@nox.session
+@nox.session(default=False)
 def gendoc(session):
     session.install("-r", "requirements.txt")
     session.install("-r", "requirements_doc.txt")