Duplicate id attributes

[BurdetteLamar]

In the doc for Regexp, there are duplicate values for attribute id; attribute id="class-regexp-method-match" appears in two different h2 elements:

<span id="class-Regexp-label-Method+match" class="legacy-anchor"></span>
<h2 id="class-regexp-method-match"><a href="[#class-regexp-method-match](view-source:https://docs.ruby-lang.org/en/master/Regexp.html#class-regexp-method-match)">Method <code>match</code></a></h2>

<p>Each of the methods <a href="[Regexp.html#method-i-match](view-source:https://docs.ruby-lang.org/en/master/Regexp.html#method-i-match)"><code>Regexp#match</code></a>, <a href="[String.html#method-i-match](view-source:https://docs.ruby-lang.org/en/master/String.html#method-i-match)"><code>String#match</code></a>, and <a href="[Symbol.html#method-i-match](view-source:https://docs.ruby-lang.org/en/master/Symbol.html#method-i-match)"><code>Symbol#match</code></a> returns a <a href="[MatchData.html](view-source:https://docs.ruby-lang.org/en/master/MatchData.html)"><code>MatchData</code></a> object if a match was found, <code>nil</code> otherwise; each also sets <a href="[Regexp.html#class-regexp-global-variables](view-source:https://docs.ruby-lang.org/en/master/Regexp.html#class-regexp-global-variables)">global variables</a>:</p>

<pre class="ruby"><span class="ruby-string">&#39;food&#39;</span>.<span class="ruby-identifier">match</span>(<span class="ruby-regexp">/foo/</span>) <span class="ruby-comment"># =&gt; #&lt;MatchData &quot;foo&quot;&gt;</span>
<span class="ruby-string">&#39;food&#39;</span>.<span class="ruby-identifier">match</span>(<span class="ruby-regexp">/bar/</span>) <span class="ruby-comment"># =&gt; nil</span>
</pre>

<span id="class-Regexp-label-Operator+-3D~" class="legacy-anchor"></span>
<h2 id="class-regexp-operator-"><a href="[#class-regexp-operator-](view-source:https://docs.ruby-lang.org/en/master/Regexp.html#class-regexp-operator-)">Operator <code>=~</code></a></h2>

<p>Each of the operators <a href="[Regexp.html#method-i-3D~](view-source:https://docs.ruby-lang.org/en/master/Regexp.html#method-i-3D~)"><code>Regexp#=~</code></a>, <a href="[String.html#method-i-3D~](view-source:https://docs.ruby-lang.org/en/master/String.html#method-i-3D~)"><code>String#=~</code></a>, and <a href="[Symbol.html#method-i-3D~](view-source:https://docs.ruby-lang.org/en/master/Symbol.html#method-i-3D~)"><code>Symbol#=~</code></a> returns an integer offset if a match was found, <code>nil</code> otherwise; each also sets <a href="[Regexp.html#class-regexp-global-variables](view-source:https://docs.ruby-lang.org/en/master/Regexp.html#class-regexp-global-variables)">global variables</a>:</p>

<pre class="ruby"><span class="ruby-regexp">/bar/</span> <span class="ruby-operator">=~</span> <span class="ruby-string">&#39;foo bar&#39;</span> <span class="ruby-comment"># =&gt; 4</span>
<span class="ruby-string">&#39;foo bar&#39;</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp">/bar/</span> <span class="ruby-comment"># =&gt; 4</span>
<span class="ruby-regexp">/baz/</span> <span class="ruby-operator">=~</span> <span class="ruby-string">&#39;foo bar&#39;</span> <span class="ruby-comment"># =&gt; nil</span>
</pre>

<span id="class-Regexp-label-Method+match-3F" class="legacy-anchor"></span>
<h2 id="class-regexp-method-match"><a href="[#class-regexp-method-match](view-source:https://docs.ruby-lang.org/en/master/Regexp.html#class-regexp-method-match)">Method <code>match?</code></a></h2>