lass='tstring_end'>&#39;</span></span><span class='comma'>,</span> <span class='const'>Cover</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><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='const'>File</span><span class='period'>.</span><span c