fix HTML error in rules

A "<p>..</p>" may not span a list, nor a blockquote.

next/rules.html

@@ -784,7 +784,6 @@ unless of course you’re the original authors, in which case they are original.
 Nevertheless tools such as those listed are <strong>NOT</strong> obfuscated. If submitted, they
 would probably violate a number of rules. :-)
 </p>
-<p class="leftbar">
 <ul>
 <li><a href="https://github.com/ioccc-src/mkiocccentry/blob/master/mkiocccentry.c">mkiocccentry(1)</a></li>
 <li><a href="https://github.com/ioccc-src/mkiocccentry/blob/master/iocccsize.c">iocccsize(1)</a></li>
@@ -795,7 +794,6 @@ would probably violate a number of rules. :-)
 <li><a href="https://github.com/lcn2/dbg">dbg repo as cloned by the mkiocccentry repo</a></li>
 <li><a href="https://github.com/lcn2/dyn_array">dyn_array repo as cloned by the mkiocccentry repo</a></li>
 </ul>
-</p>
 <p class="leftbar">
 The IOCCC has a rich history of remarkable winning entries created by
 authors who skillfully employed various techniques to develop their code.
@@ -876,12 +874,10 @@ and including <strong>10.000000</strong> (ten in base 10) submissions <strong>PE
 If this seems unreasonable we suggest you wait until the next contest and in
 the interim ponder this (modified or not) quote said by Bill Gates:
 </p>
-<p class="leftbar">
 <blockquote>
 <p>640K submissions ought to be enough for anybody.</p>
 <p>– Bill Gates s/640K/10/ (allegedly :-) )</p>
 </blockquote>
-</p>
 <p>Jump to: <a href="#">top</a></p>
 <div id="rule10">
 <h2 id="rule-10">Rule 10</h2>
@@ -1076,11 +1072,9 @@ for very important details behind this rule.
 <h2 id="rule-18">Rule 18</h2>
 </div>
 <p>The entirety of your submission must be submitted under the following license:</p>
-<p class="leftbar">
-<ul>
-<li><strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong></li>
-</ul>
-</p>
+<blockquote>
+<p><strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong></p>
+</blockquote>
 <p class="leftbar">
 See also <a href="#rule7">Rule 7</a>.
 </p>