title: rails console require nokogiri return false (but works in irb)
body: <p>My environment is <code>ruby 1.9.3p327</code> and <code>rails 3.2.8</code> on a mac.</p>
  
  <p>I add the gem <code>nokogiri</code> to my <code>Gemfile</code>. Run <code>bundle install</code> command. The command show me <code>Using nokogiri (1.5.5)</code> and the <code>gem list</code> command return <code>nokogiri (1.5.5)</code>.</p>
  
  <p>In the rails console <code>require 'nokogiri'</code> return <code>false</code> but in <code>irb</code> it  return <code>true</code>.</p>
  
  <p>How is this possible?</p>