Fixed discussion of `*map`s
As detailed in in this Issue:
https://github.com/sjl/learnvimscriptthehardway/issues/17
    
        | author | Richard Cheng <rcheng@neuratron.com> | 
    
        | date | Tue, 03 Apr 2012 16:04:25 +0100 | 
    
    
        | parents | 4b4ae245537b | 
    
        | children | 70fa74df63c3 | 
    
        | branches/tags | (none) | 
    
        | files | chapters/05.markdown | 
Changes
    
--- a/chapters/05.markdown	Tue Apr 03 15:53:57 2012 +0100
+++ b/chapters/05.markdown	Tue Apr 03 16:04:25 2012 +0100
@@ -90,7 +90,7 @@
 character.
 
 Each of the `*map` commands has a `*noremap` counterpart that ignores other
-mappings: `nnoremap`, `vnoremap`, and `inoremap`.
+mappings: `noremap`, `nnoremap`, `vnoremap`, and `inoremap`.
 
 When to Use
 -----------
@@ -102,7 +102,7 @@
 
 **No, seriously, ALWAYS.**
 
-Using a bare `nmap` is just *asking* for pain down the road when you install
+Using a bare `*map` is just *asking* for pain down the road when you install
 a plugin or add a new custom mapping.  Save yourself the trouble and type the
 extra characters to make sure it never happens.