Backport another patch from upstream for Python 3.9 support

46372726.patch

@@ -0,0 +1,41 @@
+From f236cd03e4853fd8b07a307e334c5110a78c1335 Mon Sep 17 00:00:00 2001
+From: Eric Wieser <wieser.eric@gmail.com>
+Date: Mon, 27 Apr 2020 14:44:37 +0100
+Subject: [PATCH] Do not emit type arguments twice
+
+Fixes gh-7567
+---
+ sphinx/util/inspect.py | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/sphinx/util/inspect.py b/sphinx/util/inspect.py
+index 20af75628..4977af07f 100644
+--- a/sphinx/util/inspect.py
++++ b/sphinx/util/inspect.py
+@@ -505,8 +505,13 @@ class Signature:
+                 qualname = self.format_annotation(annotation.__origin__)  # ex. Union
+         elif hasattr(annotation, '__qualname__'):
+             qualname = '%s.%s' % (module, annotation.__qualname__)
++        elif hasattr(annotation, '__origin__'):
++            # instantiated generic provided by a user
++            qualname = self.format_annotation(annotation.__origin__)
+         else:
+-            qualname = repr(annotation)
++            # we weren't able to extract the base type, appending arguments would
++            # only make them appear twice
++            return repr(annotation)
+ 
+         if getattr(annotation, '__args__', None):
+             if qualname == 'Union':
+@@ -519,7 +524,7 @@ class Signature:
+                 args = ', '.join(self.format_annotation(a) for a in annotation.__args__[:-1])
+                 returns = self.format_annotation(annotation.__args__[-1])
+                 return '%s[[%s], %s]' % (qualname, args, returns)
+-            elif annotation._special:
++            elif getattr(annotation, '_special', False):
+                 return qualname
+             else:
+                 args = ', '.join(self.format_annotation(a) for a in annotation.__args__)
+-- 
+2.26.2
+

python-sphinx.spec

@@ -45,6 +45,10 @@ Patch1:     sphinx-test_theming.diff
 # Backport: test: Add a docstring to avoid an error on py39a5+
 Patch2:     https://github.com/sphinx-doc/sphinx/commit/ffb1ca3a.patch
 
+# Backport: Do not emit type arguments twice (needed for Python 3.9)
+# Rebased from https://github.com/sphinx-doc/sphinx/commit/46372726
+Patch3:     46372726.patch
+
 BuildArch:     noarch
 
 BuildRequires: python3-devel