int.denominator, int.imag: More precise return types (#8266)

Author: AlexWaygood

stdlib/builtins.pyi

@@ -205,11 +205,11 @@ class int:
     @property
     def real(self) -> int: ...
     @property
-    def imag(self) -> int: ...
+    def imag(self) -> Literal[0]: ...
     @property
     def numerator(self) -> int: ...
     @property
-    def denominator(self) -> int: ...
+    def denominator(self) -> Literal[1]: ...
     def conjugate(self) -> int: ...
     def bit_length(self) -> int: ...
     if sys.version_info >= (3, 10):