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

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Author: pre-commit-ci[bot]

doc/en/example/simple.rst

@@ -423,19 +423,20 @@ This is a simple way to do it:
         # called "normally"
         ...
 
-This works great, but you should be aware that there is an issue with it. If there is a pytest import anywhere 
+This works great, but you should be aware that there is an issue with it. If there is a pytest import anywhere
 in your code flow, ``"pytest" in sys.modules`` will return True even if your code is not actually running from within a pytest run.
 
 .. code-block:: python
 
     import sys
 
-    import pytest # unused anywhere in your code
+    import pytest  # unused anywhere in your code
 
 
     def is_called_from_test_by_pytest():
         return "pytest" in sys.modules
 
+
     # is_called_from_test_by_pytest() will return True even if your code is not actually running from within a pytest run
     # as there is a pytest import in your code flow