info.texi tweaks re S-SPC

* doc/misc/info.texi (Help-Small-Screen): Clarify details of S-SPC.
(Help-Small-Screen, Help-]): Do not mention S-SPC.
(Emacs Info Variables): Markup fix.

doc/misc/ChangeLog

 2014-06-08  Glenn Morris  <rgm@gnu.org>
 
+	* info.texi (Help-Small-Screen): Clarify details of S-SPC.
+	(Help-Small-Screen, Help-]): Do not mention S-SPC.
+	(Emacs Info Variables): Markup fix.
+
 	* ebrowse.texi (Source Display, Finding/Viewing):
 	* erc.texi (Sample Session):
 	* ses.texi (The Basics):

doc/misc/info.texi

@@ -158,12 +158,16 @@ text @samp{Top} instead, it means that there is more text below that
 does not fit.  To move forward through the text and see another screen
 full, press @key{SPC}, the Space bar.  To move back up, press the key
 labeled @samp{Backspace} or @samp{DEL} (on some keyboards, this key
-might be labeled @samp{Delete}), or @key{S-SPC}.
+might be labeled @samp{Delete}).  In a graphical Emacs, you can also use
+@kbd{S-@key{SPC}} (press and hold the @key{Shift} key and then press
+@key{SPC}) to move backwards, but this does not work in the
+stand-alone Info reader (nor in Emacs, if you are using it in a
+text-mode terminal).
 
 @ifinfo
-Here are 40 lines of junk, so you can try @key{SPC} and @key{DEL} (or
-@key{S-SPC}) and see what they do.  At the end are instructions of
-what you should do next.
+Here are 40 lines of junk, so you can try @key{SPC} and @key{DEL} and
+see what they do.  At the end are instructions of what you should do
+next.
 
 @format
 This is line 20
@@ -209,11 +213,11 @@ This is line 59
 @end format
 
 If you have managed to get here, go back to the beginning with
-@kbd{DEL} (or @key{S-SPC}), and come back here again, then you
-understand the about the @samp{Space} and @samp{Backspace} keys.  So
-now type an @kbd{n}---just one character; don't type the quotes and
-don't type the Return key afterward---to get to the normal start of
-the course.
+@key{DEL} (or @key{BACKSPACE}), and come back here again, then you
+understand about the @samp{Space} and @samp{Backspace} keys.  So now
+type an @kbd{n}---just one character; don't type the quotes and don't
+type the Return key afterward---to get to the normal start of the
+course.
 @end ifinfo
 
 @node Help
@@ -478,10 +482,10 @@ you to the following node in the manual @emph{regardless of level}.
 If you immediately want to go to that node, without having to scroll
 to the bottom of the screen first, you can type @kbd{]}.
 
-Similarly, @kbd{@key{BACKSPACE}} (or @kbd{@key{S-SPC}}) carries you to
-the preceding node regardless of level, after you scrolled to the
-beginning of the present node.  If you want to go to the preceding
-node immediately, you can type @kbd{[}.
+Similarly, @kbd{@key{BACKSPACE}} carries you to the preceding node
+regardless of level, after you scrolled to the beginning of the
+present node.  If you want to go to the preceding node immediately,
+you can type @kbd{[}.
 
 For instance, typing this sequence will come back here in three steps:
 @kbd{[ n [}.  To do the same backward, type @kbd{] p ]}.
@@ -1214,7 +1218,7 @@ all text that could potentially be useful.
 
 @item Info-scroll-prefer-subnodes
 If set to a non-@code{nil} value, @key{SPC} and @key{BACKSPACE} (or
-@key{DEL}, or @key{S-SPC}) keys in a menu visit subnodes of the
+@key{DEL}, or @kbd{S-@key{SPC}}) keys in a menu visit subnodes of the
 current node before scrolling to its end or beginning, respectively.
 For example, if the node's menu appears on the screen, the next
 @key{SPC} moves to a subnode indicated by the following menu item.