[development] behaviors context

[Daniel F. Kudwien]

> The context is supposed to be the element to be 
> processed--not a jQuery object but the page element. See the 
> 5 - 6 upgrade notes:
> http://drupal.org/node/114774#javascript-behaviors
> 
> However, this fact may have been lost along the way.

Note that even misc/ahah.js passes an jQuery object:

  if (new_content.parents('html').length > 0) {
    Drupal.attachBehaviors(new_content);
  }


However, passing a string as context sounds a bit wrong.  Behaviors usually
expect a DOM element.

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