fix flake8 transgressions

Author: RonnyPfannschmidt

testing/test_functions.py

@@ -4,6 +4,7 @@
 from setuptools_scm.version import guess_next_version, meta, format_version
 from setuptools_scm.utils import has_command
 
+
 class MockTime(object):
     def __format__(self, *k):
         return 'time'
@@ -67,4 +68,4 @@ def test_dump_version_works_with_pretend(tmpdir, monkeypatch):
 def test_has_command(recwarn):
     assert not has_command('yadayada_setuptools_aint_ne')
     msg = recwarn.pop()
-    assert 'yadayada' in str(msg.message)
+    assert 'yadayada' in str(msg.message)