Trouble in following the documentation order

Update:

In this case, the first steps of the flow are the same. However, when the user grants the permissions to your application he will be redirected to the url as specified when you registered your application with an access_code parameter. 
to:
In this case when the user grants the permissions to your application he will be redirected to the url as specified when you registered your application with an access_code parameter. 

and

http://your_url?access_code=...
to
http://your_url?code=...