I noticed a typo in the Python TUI window documentation.
@end defun
The factory function that you supply should return an object
-conforming to the TUI window protocol. These are the method that can
+conforming to the TUI window protocol. These are the methods that can
be called on this object, which is referred to below as the ``window
object''. The methods documented below are optional; if the object
does not implement one of these methods, @value{GDBN} will not attempt