Unnecessary documention joke

In the rdocs to validates_inclusion_of there is this example:

validates_inclusion_of :gender, :in => %w( m f ), :message => "woah! what are you then!??!!"

I know it is not a big deal, but to me this does not feel too modern. In my mind Ruby and Rails stand for all that is good in this world (almost ;-) and this IMHO does not belong in the formal docs. The example might be a valid one since most systems only allow m/f but the message is a bit too much.