def tell_me_the_future
      s = ""
      num_e = 0

      @lines_index.upto(@lines.size - 1) do |i|
        c = case @lines[i].md_type
            when :text; "t"
            when :empty; num_e += 1; "e"
            when :definition; "d"
            else "o"
            end
        s << c
        break if c == "d" or num_e > 1
      end
      s
    end
def tell_me_the_future
      s = ""
      num_e = 0

      @lines_index.upto(@lines.size - 1) do |i|
        c = case @lines[i].md_type
            when :text; "t"
            when :empty; num_e += 1; "e"
            when :definition; "d"
            else "o"
            end
        s << c
        break if c == "d" or num_e > 1
      end
      s
    end
Returns the type of next line as a string
 breaks at first :definition