[mew-int 2762] Patch: 2 cross-references for manual

This patch adds 2 cross-references to the Mew manual (the English version
only).  These help the reader to understand the Summary Mode display.

The patch also fixes a typo.

                    -Michael Ernst



--- mew.texi.~1.366.~	2009-11-04 09:39:56.000000000 -0800
+++ mew.texi	2009-11-06 16:50:54.000000000 -0800
@@ -317,7 +317,7 @@
 Mew  7 
 @end ifset
 @ifset us
-Mew has the following six modes:
+Mew has the following seven modes:
 @end ifset
 
 @table @samp
@@ -1029,7 +1029,7 @@
 @end ifset
 @ifset us
 As you can see the example above, the format of Summary mode consists of
-a mark, data type (a mark by Mew), date, a sender, Subject:, and a body.
+a mark (@pxref{Marks}), data type (a mark by Mew, @pxref{mew-mark}), date, a sender, Subject:, and a body.
 @end ifset
 
 @ifset jp