update other entry HTML files

Ran `make gen_other_html` to perform the above.

2020/ferguson1/HACKING.html

@@ -511,6 +511,8 @@ done for maximum number of movements before game over. These would both be
 rather easy to implement but personally I would only consider the max number of
 evasions (I just don’t have many more bytes left!) - unless maybe that there is
 no default limit on max moves.</p>
+<hr style="width:10%;text-align:left;margin-left:0">
+<p>Jump to: <a href="#">top</a></p>
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