Address reviewer comments

Author: vincentmacri

pyproject.toml

@@ -243,7 +243,6 @@ target-version = "py311"
 [tool.ruff.lint]
 ignore = [
   "E501", # Line too long - hard to avoid in doctests, and better handled by black.
-  "UP045", # non-pep604-annotation-optional - Whether `Optional[T]` or `T | None` is better is subjective.
 ]
 select = [
   "E", # pycodestyle errors - https://docs.astral.sh/ruff/rules/#error-e

src/sage/rings/function_field/element_rational.pyi

@@ -1,6 +1,5 @@
 from typing import Any
 from sage.rings.function_field.element import FunctionFieldElement
-import builtins
 
 class FunctionFieldElement_rational(FunctionFieldElement):
     def __init__(self, parent: Any, x: Any, reduce: bool = True) -> None:
@@ -12,7 +11,7 @@ class FunctionFieldElement_rational(FunctionFieldElement):
     def element(self) -> Any:
         ...
 
-    def list(self) -> builtins.list:
+    def list(self) -> list:
         ...
 
     def _repr_(self) -> str:

src/sage/rings/laurent_series_ring_element.pyi

@@ -1,5 +1,4 @@
 from typing import Any, Optional, Union
-import builtins
 
 class LaurentSeriesRingElement:
     def __init__(self, parent: Any, f: Any, n: int = 0) -> None:
@@ -23,7 +22,7 @@ class LaurentSeriesRingElement:
     def __bool__(self) -> bool:
         ...
 
-    def _im_gens_(self, codomain: Any, im_gens: builtins.list[Any], base_map: Optional[Any] = None) -> 'LaurentSeriesRingElement':
+    def _im_gens_(self, codomain: Any, im_gens: list[Any], base_map: Optional[Any] = None) -> 'LaurentSeriesRingElement':
         ...
 
     def _normalize(self) -> None:
@@ -49,16 +48,16 @@ class LaurentSeriesRingElement:
     def __iter__(self) -> Any:
         ...
 
-    def list(self) -> builtins.list[Any]:
+    def list(self) -> list[Any]:
         ...
 
-    def coefficients(self) -> builtins.list[Any]:
+    def coefficients(self) -> list[Any]:
         ...
 
     def residue(self) -> Any:
         ...
 
-    def exponents(self) -> builtins.list[int]:
+    def exponents(self) -> list[int]:
         ...
 
     def laurent_polynomial(self) -> Any: