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

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

tests/test_modutils.py

@@ -270,7 +270,7 @@ def test_std_lib(self) -> None:
 
     def test_std_lib_found_before_same_named_package_on_path(self) -> None:
         realpath = str(resources.RESOURCE_PATH)
-        realpath_slashes = realpath.replace('\\', '\\\\')
+        realpath_slashes = realpath.replace("\\", "\\\\")
         if WIN32:
             raise AssertionError(realpath + realpath_slashes)
         sys.path.insert(0, realpath)