improve layout of 1984/laman/index.html

Fixed code block.

Run `bin/readme2index.sh -v 1 1984/laman` to perform the above.

2013/cable3/index.html

@@ -518,7 +518,6 @@ the source size down. Other compilers are likely to produce similar warnings.</p
 <div id="inventory">
 <h1 id="inventory-for-2013cable3">Inventory for 2013/cable3</h1>
 </div>
-<p><a href="#top">Jump to top</a></p>
 <h2 id="primary-files">Primary files</h2>
 <ul>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable3/cable3.c">cable3.c</a> - entry source</li>
@@ -547,6 +546,10 @@ the source size down. Other compilers are likely to produce similar warnings.</p
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable3/.path">.path</a> - directory path from top directory</li>
 <li><a href="index.html">index.html</a> - this web page</li>
 </ul>
+<hr style="width:10%;text-align:left;margin-left:0">
+<h4>
+Jump to: <a href="#">top</a>
+</h4>
 
 <!-- END: next line ends content generated by: bin/output-index-inventory.sh -->