bug#21327: [PATCH] Use @sub and @sup in documentation

[Xue Fuqiao <xfq.free@gmail.com>]

Use @sub and @sup instead of [0-9]+\^[0-9]+ or [0-9]+\*\*[0-9]+ for
inserting subscripts and superscripts in *.texi files.

From: Xue Fuqiao <xfq.free@gmail.com>
Date: Sun, 23 Aug 2015 18:22:55 +0800
Subject: [PATCH] Use @sub and @sup in documentation

* doc/lispref/modes.texi (%-Constructs):
* doc/lispref/help.texi (Describing Characters):
* doc/emacs/display.texi (Optional Mode Line): Use @sub and @sup
for subscripts and superscripts.
---
 doc/emacs/display.texi | 5 +++--
 doc/lispref/help.texi  | 6 +++---
 doc/lispref/modes.texi | 6 +++---
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/doc/emacs/display.texi b/doc/emacs/display.texi
index 601a40b..9eac674 100644
--- a/doc/emacs/display.texi
+++ b/doc/emacs/display.texi
@@ -1279,8 +1279,9 @@ following the buffer percentage like this:

 @noindent
 Here @var{size} is the human readable representation of the number of
-characters in the buffer, which means that @samp{k} for 10^3, @samp{M}
-for 10^6, @samp{G} for 10^9, etc., are used to abbreviate.
+characters in the buffer, which means that @samp{k} for 10@sup{3},
+@samp{M} for 10@sup{6}, @samp{G} for 10@sup{9}, etc., are used to
+abbreviate.

 @cindex line number display
 @cindex display of line number
diff --git a/doc/lispref/help.texi b/doc/lispref/help.texi
index ab1696e..fa2de8c 100644
--- a/doc/lispref/help.texi
+++ b/doc/lispref/help.texi
@@ -494,9 +494,9 @@ standard Emacs notation for characters that appear
in text---like
 @code{single-key-description}, except that control characters are
 represented with a leading caret (which is how control characters in
 Emacs buffers are usually displayed).  Another difference is that
-@code{text-char-description} recognizes the 2**7 bit as the Meta
-character, whereas @code{single-key-description} uses the 2**27 bit
-for Meta.
+@code{text-char-description} recognizes the 2@sup{7} bit as the Meta
+character, whereas @code{single-key-description} uses the 2@sup{27}
+bit for Meta.

 @smallexample
 @group
diff --git a/doc/lispref/modes.texi b/doc/lispref/modes.texi
index a8b6bb1..ad3842f 100644
--- a/doc/lispref/modes.texi
+++ b/doc/lispref/modes.texi
@@ -2092,9 +2092,9 @@ The size of the accessible part of the current
buffer; basically
 @code{(- (point-max) (point-min))}.

 @item %I
-Like @samp{%i}, but the size is printed in a more readable way by using
-@samp{k} for 10^3, @samp{M} for 10^6, @samp{G} for 10^9, etc., to
-abbreviate.
+Like @samp{%i}, but the size is printed in a more readable way by
+using @samp{k} for 10@sup{3}, @samp{M} for 10@sup{6}, @samp{G} for
+10@sup{9}, etc., to abbreviate.

 @item %l
 The current line number of point, counting within the accessible portion
-- 
2.5.0