Editorial: remove redundant decimal character reference start state

The numeric character reference state can dispatch on ASCII digits
directly and reconsume in the decimal character reference state, so the
separate start state was pure indirection. The removed state's generated
ID is preserved on the ASCII digit case for existing anchors.

Fixes #2733.

Author: annevk

source

@@ -144094,6 +144094,7 @@ dictionary <dfn dictionary>StorageEventInit</dfn> : <span>EventInit</span> {
   </dl>
   </div>
 
+
   <h5><dfn>Numeric character reference state</dfn></h5>
 
   <div algorithm>
@@ -144103,28 +144104,14 @@ dictionary <dfn dictionary>StorageEventInit</dfn> : <span>EventInit</span> {
   <p>Consume the <span>next input character</span>:</p>
 
   <dl class="switch">
-
     <dt>U+0078 LATIN SMALL LETTER X</dt>
     <dt>U+0058 LATIN CAPITAL LETTER X</dt>
     <dd>Append the <span>current input character</span> to the <var data-x="temporary
     buffer">temporary buffer</var>. Switch to the <span>hexadecimal character reference start
     state</span>.</dd>
 
-    <dt>Anything else</dt>
-    <dd><span>Reconsume</span> in the <span>decimal character reference start state</span>.</dd>
-  </dl>
-  </div>
-
-
-  <h5><dfn>Hexadecimal character reference start state</dfn></h5>
-
-  <div algorithm>
-  <p>Consume the <span>next input character</span>:</p>
-
-  <dl class="switch">
-
-    <dt><span data-x="ASCII hex digits">ASCII hex digit</span></dt>
-    <dd><span>Reconsume</span> in the <span>hexadecimal character reference state</span>.</dd>
+    <dt id="decimal-character-reference-start-state"><span data-x="ASCII digits">ASCII digit</span></dt>
+    <dd><span>Reconsume</span> in the <span>decimal character reference state</span>.</dd>
 
     <dt>Anything else</dt>
     <dd>This is an <span
@@ -144135,15 +144122,14 @@ dictionary <dfn dictionary>StorageEventInit</dfn> : <span>EventInit</span> {
   </div>
 
 
-  <h5><dfn>Decimal character reference start state</dfn></h5>
+  <h5><dfn>Hexadecimal character reference start state</dfn></h5>
 
   <div algorithm>
   <p>Consume the <span>next input character</span>:</p>
 
   <dl class="switch">
-
-    <dt><span data-x="ASCII digits">ASCII digit</span></dt>
-    <dd><span>Reconsume</span> in the <span>decimal character reference state</span>.</dd>
+    <dt><span data-x="ASCII hex digits">ASCII hex digit</span></dt>
+    <dd><span>Reconsume</span> in the <span>hexadecimal character reference state</span>.</dd>
 
     <dt>Anything else</dt>
     <dd>This is an <span