[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

testing/test_error_diffs.py

@@ -208,14 +208,14 @@ def test_this():
         """
         >       assert result == expected
         E       AssertionError: assert {'d': 4, 'c': 3, 'b': 2, 'a': 1} == {'d': 4, 'c': 3, 'e': 5}
-        E         
+        E
         E         Common items:
         E         {'d': 4, 'c': 3}
         E         Left contains 2 more items:
         E         {'b': 2, 'a': 1}
         E         Right contains 1 more item:
         E         {'e': 5}
-        E         
+        E
         E         Full diff:
         E           {
         E               'd': 4,
@@ -239,15 +239,15 @@ def test_this():
         """
         >       assert result == expected
         E       AssertionError: assert {'c': 3, 'd': 4, 'b': 2, 'a': 1} == {'d': 5, 'c': 3, 'b': 1}
-        E         
+        E
         E         Common items:
         E         {'c': 3}
         E         Differing items:
         E         {'d': 4} != {'d': 5}
         E         {'b': 2} != {'b': 1}
         E         Left contains 1 more item:
         E         {'a': 1}
-        E         
+        E
         E         Full diff:
         E           {
         E         -     'd': 5,