Fix hint in exercise in Chapter 9
gv is not required. `< and `> are, though!
    
        | author | Richard Cheng <rcheng@neuratron.com> | 
    
        | date | Tue, 03 Apr 2012 17:30:39 +0100 | 
    
    
        | parents | 383d371f3f1c | 
    
        | children | 5f0854fc2f0c | 
    
        | branches/tags | (none) | 
    
        | files | chapters/09.markdown | 
Changes
    
--- a/chapters/09.markdown	Tue Apr 03 16:04:25 2012 +0100
+++ b/chapters/09.markdown	Tue Apr 03 17:30:39 2012 +0100
@@ -76,8 +76,8 @@
 instead of double quotes.
 
 Try using `vnoremap` to add a mapping that will wrap whatever text you have
-*visually selected* in quotes.  You'll probably need the `gv` command for this,
-so read up on it with `:help gv`.
+*visually selected* in quotes.  You'll probably need the ```<`` and ```>``
+commands for this, so read up on them with ``:help `<``.
 
 Map `H` in normal mode to go to the beginning of the current line.  Since `h`
 moves left you can think of `H` as a "stronger" `h`.