c - Where does pretty_print function come from if I pry Array in Ruby -

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I am playing with nervousness and some hits that confuse me. 

  irb pry CD Array Pee (array): & gt;   
  show-method  returns:  
  def pretty_print ... def pretty_print_cycle ...   
 Where are those methods? I looked at Ruby Array and did not know the methods. I went and saw Array.c and could not get Array.rb. However, I can not find beautiful_print in Array C  
 Can anyone understand me?  
 Thank you!   
 
 
 try it:  
  []. Method (: beautiful_print) .source_location = & gt; ["/home/joel/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/pp.rb", 328]   
 show-method sounds It gives the same information:  
  show-method []. From utility_print: /home/joel/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/ PP. RB @ Line 328: Owner: Array Visibility: Number of Public Lines: 7 DF Beautiful_print (q) q.group (1, '[', ']') {q.seplist (self) {| V | Q.pp v}} and   
 pry.rb should be a PP:

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