Clarify the need for chapters 28 and 29.
    
        | author | Steve Losh <steve@stevelosh.com> | 
    
        | date | Fri, 12 Oct 2012 20:02:43 -0400 | 
    
    
        | parents | 2ca28cad56b9 | 
    
        | children | bf920f3f032a | 
    
        | branches/tags | (none) | 
    
        | files | chapters/28.markdown chapters/29.markdown | 
Changes
    
--- a/chapters/28.markdown	Fri Oct 12 19:57:47 2012 -0400
+++ b/chapters/28.markdown	Fri Oct 12 20:02:43 2012 -0400
@@ -2,7 +2,8 @@
 =======
 
 The `execute` command is used to evaluate a string as if it were a Vimscript
-command.  Run the following command:
+command.  We saw it in an earlier chapter, but now we're going to take another
+look at it because it's used extremely often.  Run the following command:
 
     :::vim
     :execute "echom 'Hello, world!'"
--- a/chapters/29.markdown	Fri Oct 12 19:57:47 2012 -0400
+++ b/chapters/29.markdown	Fri Oct 12 20:02:43 2012 -0400
@@ -5,7 +5,8 @@
 all the stuff you do on a daily basis in normal mode?  Can we somehow use all
 the knowledge we have from editing text in our scripting?
 
-The answer is: "of course".  Run the following command:
+The answer is: "of course".  We've seen the `normal` command before, and now
+it's time to revisit it in a bit more detail.  Run the following command:
 
     :::vim
     :normal G