src/sage/categories/pushout.py: Fix pycodestyle

Matthias Koeppe · Matthias Koeppe · commit 2c6f7ee2dbc4 · 2022-08-22T22:17:28.000-07:00
diff --git a/src/sage/categories/pushout.py b/src/sage/categories/pushout.py
@@ -1873,7 +1873,7 @@ def __init__(self, n=None, is_sparse=False, inner_product_matrix=None, *,
         self.latex_name_mapping = latex_name_mapping
 
     def _apply_functor(self, R):
-        """
+        r"""
         Apply the functor to an object of ``self``'s domain.
 
         TESTS::
