Correct and reword recent changes to window.texi.

Correct and reword recent changes to window.texi.

* windows.texi (Basic Windows): Fix typo.
(Windows and Frames): Fix example.  Move description of
window-in-direction here.
(Recombining Windows): Fix example.
(Buffers and Windows): Fix description of
replace-buffer-in-windows.
(Switching Buffers): Reword.
(Display Action Functions): Minor adjustments.
(Choosing Window Options): Minor fixes.
(Window History): Minor rewording.
(Dedicated Windows): Correct and reword part describing how
dedicatedness affects functions removing buffers or windows.
* buffers.texi (The Buffer List): Fix description of
bury-buffer.