er rubyid_font'>font</span><span class='rparen'>)</span>
    <span class='kw'>end</span>
  <span class='kw'>end</span>
  <span class='id identifier rubyid_book'>book</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_chapter'>chapter</span><span class='op'>|</span>
    <span class='id identifier rubyid_target'>target</span><span class='period'>.</span><span class='id identifier rubyid_co