Updating the other window in 2 window mode

[Donald E. Hopkins <A2DEH @ MIT-MC>]

	Appending to the other buffer (^X A other_buffer_name) in 2
window mode loses by not updating the other buffer on the screen.
Also, when editing one buffer in 2 windows (^U ^X 2), if the same text
is displayed in both windows, and you change it in one of the windows,
it isn't updated in the other.
	Trivial? Yes... A pain in the ass to fix? Probibly... Worth
fixing? Who knows... But none the less, . *SIGH*
	-Don
[Yes, I tested these out in a fresh Emacs.]