src/sage/manifolds/differentiable/tensorfield.py: Don't string-quote types

Matthias Koeppe · Matthias Koeppe · commit 7c18c7f8cd8c · 2022-03-28T09:41:46.000-07:00
diff --git a/src/sage/manifolds/differentiable/tensorfield.py b/src/sage/manifolds/differentiable/tensorfield.py
@@ -3734,9 +3734,7 @@ def at(self, point):
 
     def up(
         self,
-        non_degenerate_form: Union[
-            "PseudoRiemannianMetric", "SymplecticForm", "PoissonTensorField"
-        ],
+        non_degenerate_form: Union[PseudoRiemannianMetric, SymplecticForm, PoissonTensorField],
         pos: Optional[int] = None,
     ) -> "TensorField":
         r"""
