title: error parsing `Gemfile` expecting keyword_end. Bundler cannot continue
body: <p>I'm new to ROR.  I've searched and searched but can't find this answer.  I think it has to do with not having an 'end' somewhere, but it looks to me like there are the right number of openings and closings. I need another pair of eyes please.
  I'm trying to run bundle install with this flag..</p>
  <pre><code>$ bundle install --without production. 
  </code></pre>
  <p>The error I get is this:</p>
  <blockquote>
  <p>There was an error parsing <code>Gemfile</code>: syntax error, unexpected end-of-input, expecting keyword_end. Bundler cannot continue.</p>
  <pre><code>#  from /home/ubuntu/workspace/hello_app/Gemfile:22
  #  -------------------------------------------
  #    gem 'rails_12factor', '0.0.2'
  </code></pre>
  </blockquote>
  <p>My Gemfile:</p>
  <pre><code>source 'https://rubygems.org'
  
  gem 'rails', '3.2.16'
   
  group :development do 
  
    gem 'sqlite3', '1.3.5'
  
  end
  
  # Gems used only for assets and not required
  # in production environments by default.
  group :assets do
  
    gem 'sass-rails',   '3.2.5'
  
    gem 'coffee-rails', '3.2.2'
  
    gem 'uglifier', '1.2.3'
  
  end
  
  gem 'jquery-rails', '2.0.2 
  
  group :production do
  
    gem 'pg', '0.12.2'
  
  end
  </code></pre>