suggested fixes

Author: fchapoton

src/sage/modular/cusps.py

@@ -467,7 +467,7 @@ def __neg__(self):
         return Cusp(-self.__a, self.__b)
 
     def is_gamma0_equiv(self, other, N,
-                        transformation=None) -> tuple[bool, Any]:
+                        transformation=None) -> bool | tuple[bool, Any]:
         r"""
         Return whether ``self`` and ``other`` are equivalent modulo the action of
         `\Gamma_0(N)` via linear fractional transformations.

src/sage/modular/cusps_nf.py

@@ -72,14 +72,14 @@
 #  Distributed under the terms of the GNU General Public License (GPL)
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
+from typing import Any
 
+from sage.misc.cachefunc import cached_method, cached_function
 from sage.structure.parent import Parent
 from sage.structure.element import Element, InfinityElement
 from sage.structure.richcmp import richcmp, rich_to_bool
 from sage.structure.unique_representation import UniqueRepresentation
 
-from sage.misc.cachefunc import cached_method, cached_function
-
 
 @cached_function
 def list_of_representatives(N):
@@ -901,7 +901,8 @@ def ABmatrix(self):
 
         return ABM
 
-    def is_Gamma0_equivalent(self, other, N, Transformation=False) -> bool:
+    def is_Gamma0_equivalent(self, other, N,
+                             Transformation=False) -> bool | tuple[bool, Any]:
         r"""
         Check if cusps ``self`` and ``other`` are `\Gamma_0(N)`- equivalent.