Fix tests for Python3.9.0a5+

Resolves https://bugzilla.redhat.com/show_bug.cgi?id=1829705

ffb1ca3a.patch

@@ -0,0 +1,22 @@
+From ffb1ca3aaafe86b6bc44fe28e4000477e97ba3e8 Mon Sep 17 00:00:00 2001
+From: Takeshi KOMIYA <i.tkomiya@gmail.com>
+Date: Sat, 18 Apr 2020 19:53:18 +0900
+Subject: [PATCH] test: Add a docstring to avoid an error on py39a5+
+
+---
+ tests/roots/test-ext-autodoc/target/__init__.py | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/tests/roots/test-ext-autodoc/target/__init__.py b/tests/roots/test-ext-autodoc/target/__init__.py
+index e28eeef8a6..b6684ee85b 100644
+--- a/tests/roots/test-ext-autodoc/target/__init__.py
++++ b/tests/roots/test-ext-autodoc/target/__init__.py
+@@ -145,6 +145,8 @@ def prop2(self):
+ 
+ 
+ class StrRepr(str):
++    """docstring"""
++
+     def __repr__(self):
+         return self
+ 

python-sphinx.spec

@@ -40,6 +40,9 @@ Source0:    %{pypi_source %{upstream_name} %{upstream_version}}
 # which causes that test to fail.
 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
+
 BuildArch:     noarch
 
 BuildRequires: python3-devel