title: ctags not indexing all the words I want
body: <p>I'm trying to indexing my rails app with ctags so that vim can give me autocompletion.
  However, ctags is not indexing all the words, especially my call to external library.
  For example:
  I have this file:</p>
  
  <pre><code>class MultipleChoice &lt; ActiveRecord::Base
    has_many :options, :class_name =&gt; 'MultipleChoiceOption', :foreign_key =&gt; :parent_id, :dependent =&gt; :destroy
    accepts_nested_attributes_for :options, :allow_destroy =&gt; true
  
    def question
      Question.find_by_data_id_and_data_type(id, MultipleChoice.name)
    end
  
    def randomized_options
      (0...options.size).to_a.shuffle.map{|index| [index, options[index]]}
    end
  
    def realized_answer(user_answer)
      user_answer.blank? ? nil : options[user_answer.to_i].content
    end
  
    def answer
      options.detect{|o| o.correct}.content
    rescue =&gt; e
      HoptoadNotifier.notify(
        :error_class   =&gt; "MultipleChoice",
        :error_message =&gt; "Exception while call #answer: #{e.message}",
        :parameters    =&gt; {:multiple_choice_id =&gt; self.id}
      )
      nil
    end
  end
  </code></pre>
  
  <p>Then ctags would index MultipleChoice (class name), answer (method name) but not HoptoadNotifier.</p>
  
  <p>I'm indexing with <code>ctags -R *</code></p>
  
  <p>Is there away to tell ctags to index them all?</p>