# File lib/diffy/diff.rb, line 85
    def each
      lines = case @options[:include_diff_info]
      when false
        # this "primes" the diff and sets up the paths we'll reference below.
        diff

        # caching this regexp improves the performance of the loop by a
        # considerable amount.
        regexp = /^(--- "?#{@paths[0]}"?|\+\+\+ "?#{@paths[1]}"?|@@|\\\\)/

        diff.split("\n").reject{|x| x =~ regexp }.map {|line| line + "\n" }

      when true
        diff.split("\n").map {|line| line + "\n" }
      end

      if block_given?
        lines.each{|line| yield line}
      else
        lines.to_enum
      end
    end