an><span class='lparen'>(</span><span class='id identifier rubyid_book'>book</span><span class='rparen'>)</span>
  <span class='id identifier rubyid_target'>target</span><span class='period'>.</span><span class='id identifier rubyid_compress_file'>compress_file</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>OEBPS/toc.ncx</span><span class='tstring_end'>&#39;</span></span><span class='comma'>,</span>          <span class='const'>Toc</span><span class='period'