gregbell/active_admin — pull request #3199 by tricknotes (2014-06-05 16:50:44+00:00)
Title: Fix doc for `permitted_params`

`permitted_params` returns params that contains the resource name as its root key.

Such as:
``` ruby
{
'post' => {
'title' => 'Rails is omakase.',
'author' => 'DHH'
}
}
```

ref: https://github.com/gregbell/active_admin/blob/master/lib/active_admin/resource_dsl.rb#L48