Fixed E201 flake8 errors

whitespace after ‘(‘

testing/python/approx.py

@@ -243,7 +243,7 @@ class TestApprox(object):
 
     def test_complex(self):
         within_1e6 = [
-            ( 1.000001 + 1.0j, 1.0 + 1.0j),
+            (1.000001 + 1.0j, 1.0 + 1.0j),
             (1.0 + 1.000001j, 1.0 + 1.0j),
             (-1.000001 + 1.0j, -1.0 + 1.0j),
             (1.0 - 1.000001j, 1.0 - 1.0j),

testing/python/metafunc.py

@@ -141,7 +141,7 @@ class TestMetafunc(object):
 
     @pytest.mark.issue510
     def test_parametrize_empty_list(self):
-        def func( y): pass
+        def func(y): pass
         metafunc = self.Metafunc(func)
         metafunc.parametrize("y", [])
         assert 'skip' in metafunc._calls[0].keywords