Minor fixes for ido.texi.

* doc/misc/ido.texi (Interactive Substring Matching): Use @key{RET}
instead of @kbd{RET}.
(Prefix Matching): Add an index.

doc/emacs/trouble.texi

@@ -1140,6 +1140,7 @@ Please help us keep up with the workload by designing the patch in a
 form that is clearly safe to install.
 @end itemize
 
+@c FIXME: Include the node above?
 @node Contributing
 @section Contributing to Emacs Development
 @cindex contributing to Emacs

doc/lispref/nonascii.texi

@@ -549,6 +549,8 @@ is @code{nil}, which means the character itself.
 @defun get-char-code-property char propname
 This function returns the value of @var{char}'s @var{propname} property.
 
+@c FIXME: Use ‘?\s’ instead of ‘? ’ for the space character in the
+@c first example?  --xfq
 @example
 @group
 (get-char-code-property ?  'general-category)

doc/misc/ChangeLog

+2013-09-11  Xue Fuqiao  <xfq.free@gmail.com>
+
+	* ido.texi (Interactive Substring Matching): Use @key{RET} instead
+	of @kbd{RET}.
+	(Prefix Matching): Add an index.
+
 2013-09-08  Glenn Morris  <rgm@gnu.org>
 
 	* emacs-gnutls.texi: Tweak direntry.

doc/misc/ido.texi

@@ -258,7 +258,7 @@ Buffer: 23@{123456 | 123@}
 At this point, you still have two matching buffers.  If you want the
 first buffer in the list, you can simply press @key{RET}.  If you want
 the second in the list, you can press @kbd{C-s} to move it to the top
-of the list and then press @kbd{RET} to select it.
+of the list and then press @key{RET} to select it.
 
 However, if you type @kbd{4}, you'll only have one match left:
 
@@ -366,6 +366,7 @@ users Ido offers in addition to the default substring matching method
 the only difference to the description of the substring matching
 above.
 
+@cindex toggle prefix matching
 You can toggle prefix matching with @kbd{C-p}
 (@code{ido-toggle-prefix}).