Skip tests that fail with newer versions of Python.

Patch copied from Gentoo:

https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-python/unittest2/files/unittest2-1.1.0-python3.5-test.patch

diff --git a/unittest2/test/test_loader.py b/unittest2/test/test_loader.py
index 683f662..347eea5 100644
--- a/unittest2/test/test_loader.py
+++ b/unittest2/test/test_loader.py
@@ -509,6 +509,7 @@ class Test_TestLoader(unittest2.TestCase):
     #
     # What happens when an impossible name is given, relative to the provided
     # `module`?
+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
     def test_loadTestsFromName__relative_malformed_name(self):
         loader = unittest.TestLoader()
 
@@ -811,6 +812,7 @@ class Test_TestLoader(unittest2.TestCase):
     # TestCase or TestSuite instance."
     #
     # What happens when presented with an impossible module name?
+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
     def test_loadTestsFromNames__malformed_name(self):
         loader = unittest2.TestLoader()
 
@@ -918,6 +920,7 @@ class Test_TestLoader(unittest2.TestCase):
     # "The method optionally resolves name relative to the given module"
     #
     # What happens when presented with an impossible attribute name?
+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
     def test_loadTestsFromNames__relative_malformed_name(self):
         loader = unittest.TestLoader()
 
9bed0d51a21ff609f7036ff40d73ff07a8'>commit</a><a href='/guix/diff/gnu/packages/patches/texinfo-headings-single.patch?id=8495069bed0d51a21ff609f7036ff40d73ff07a8'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/patches/texinfo-headings-single.patch'>
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<tr><td><span title='2022-08-11 22:39:14 +0200'>2022-08-11</span></td><td><a href='/guix/commit/gnu/packages/patches/texinfo-headings-single.patch?id=f7e8be231806a904e6817e8ab3404b32f2511db2'>gnu: texinfo: Fix @headings regression.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/texinfo-headings-single.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/texinfo.scm (texinfo)[source](patches): New field.
* gnu/packages/commencement.scm (texinfo-boot0)[source]: Use BOOTSTRAP-ORIGIN.
</span></span></td><td>Marius Bakke</td></tr>