From: Raj Singh <neeraj.jsr@...>
Date: 2009-05-06T05:50:54+09:00
Subject: delegate and unless for __

Anytime I see the delegate code usually there is an unless along with
it. The code might look like this.

Object.instance_methods.each do |m|
  delegate m, :to => :@model unless m =~ /^__/
end


I am thinking that __ is escaped so that one could called
object.__SEND__ and this call will not be sent to the delegate. Is that
the reason why __ is not delegated to the delegate or the actual
reasoning is something else?

That piece of code as picked up from http://m.onkey.org/2008/10/5/sanity
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