Run pre-commit on all files

Running pre-commit on all files after replacing reorder-python-imports by isort.

testing/freeze/create_executable.py

@@ -1,8 +1,10 @@
 """Generate an executable with pytest runner embedded using PyInstaller."""
+
 if __name__ == "__main__":
-    import pytest
     import subprocess
 
+    import pytest
+
     hidden = []
     for x in pytest.freeze_includes():
         hidden.extend(["--hidden-import", x])