Document new features of Ido

* doc/misc/ido.texi (Misc): Document 'C-S-b'.

doc/misc/ido.texi

@@ -706,7 +706,8 @@ packages.
 @noindent
 After @kbd{C-x b} (@code{ido-switch-buffer}), the buffer at the head
 of the list can be killed by pressing @kbd{C-k}.  If the buffer needs
-saving, you will be queried before the buffer is killed.
+saving, you will be queried before the buffer is killed.  @kbd{C-S-b}
+buries the buffer at the head of the list.
 
 Likewise, after @kbd{C-x C-f}, you can delete (i.e., physically
 remove) the file at the head of the list with @kbd{C-k}.  You will

etc/NEWS

@@ -479,9 +479,13 @@ If you need your objects to be named, do it by inheriting from `eieio-named'.
 *** `constructor' is now an obsolete alias for `make-instance'.
 
 ** ido
+
++++
 *** New command `ido-bury-buffer-at-head' bound to C-S-b
 Bury the buffer at the head of `ido-matches', analogous to how C-k
 kills the buffer at head.
+
+---
 *** A prefix argument to `ido-restrict-to-matches' will reverse its
 meaning, and the list is restricted to those elements that do not
 match the current input.