give more in depth description of SSHKEY_AUTHORIZED_KEYS_COMMAND

README.md

@@ -19,18 +19,26 @@ In order to associate an incoming public key with a user you must define
 SSHKEY\_AUTHORIZED\_KEYS\_COMMAND in your project's settings.py.  This should
 be a string containing the command which is run after successful
 authentication, with "{username}" being replaced with the username of the user
-associated with the incoming public key.
+associated with the incoming public key.  For instance:
+
+> SSHKEY\_AUTHORIZED\_KEYS\_COMMAND = 'my-command {username}'
+
+will cause keys produced by the below commands to look similar to:
+
+> command="my-command fred" ssh-rsa BLAHBLAHBLAH
+
+assuming the key "BLAHBLAHBLAH" is owned by fred.
 
 ## URL Configuration
 
 This text assumes that your Django project's urls.py maps sshkey.urls into the
 url namespace as follows:
 
-urlpatterns = patterns('',
-  ...
-  url('^sshkey/', include(sshkey.urls)),
-  ...
-)
+> urlpatterns = patterns('',
+>   ...
+>   url('^sshkey/', include(sshkey.urls)),
+>   ...
+> )
 
 You will need to adjust your URLs if you use a different mapping.