pass filtered content when generating rss2 feed

[hailin]

when we generate rss2 feed, we pass in raw post->content. We should filter the content first in order to parse the shortcodes, if there are any, then call do_action('rss2_item').

also aligned the formatting a little bit.

patch

There is no need to pass the content to the rss2_item hook, especially the filtered content. If you need it, just global $post inside your plugin. It's just a normal Loop.

And your formatting just adds tons of unneeded line breaks.

sounds reasonable. I guess the styling is more of personal preference.
I like aligning everything logically, while leaving spaces between lines.