install in rvm-1.0.19 vs install in rvm-1.0.20

@@ -143,10 +143,10 @@
 If I do not respond right away, please hang around after asking your
 question, I will respond as soon as I am back.  It is best to talk in
 #rvm itself as then other users can help out should I be offline.
 
 Be sure to get head often as rvm development happens fast,
-you can do this by running 'rvm update --head' followed by 'rvm reload'
+you can do this by running 'rvm get head' followed by 'rvm reload'
 or opening a new shell
 
   w⦿‿⦿t
 
     ~ Wayne