Easy RFC822 Datetimes for RSS in Rails

If you are generating an RSS feed in your Rails app you might be doing something like this for datetimes (eg. pubDate):

item.updated_at.strftime("%a, %d %b %Y %H:%M:%S %z")

There is a much simpler way. Datetimes in Rails have an rfc2882 method that gives us the right format automatically:

item.updated_at.rfc2822

This way is a lot cleaner and easier to read.