Fix positional-only differences in _tkinter (#7224)

Author: AlexWaygood

stdlib/_tkinter.pyi

@@ -20,12 +20,12 @@ class Tcl_Obj:
     string: str | bytes
     typename: str
     __hash__: None  # type: ignore[assignment]
-    def __eq__(self, other): ...
-    def __ge__(self, other): ...
-    def __gt__(self, other): ...
-    def __le__(self, other): ...
-    def __lt__(self, other): ...
-    def __ne__(self, other): ...
+    def __eq__(self, __other): ...
+    def __ge__(self, __other): ...
+    def __gt__(self, __other): ...
+    def __le__(self, __other): ...
+    def __lt__(self, __other): ...
+    def __ne__(self, __other): ...
 
 class TclError(Exception): ...