Editorial: Fix wording in inter-element WS dfn

source

@@ -10179,9 +10179,9 @@ console.assert(image.height === 200);</pre>
   model. The <dfn data-x="concept-html-contents">contents</dfn> of an element are its children in the
   DOM.</p>
 
-  <p>The <span>ASCII whitespace</span> are always allowed between elements. User agents represent
-  these characters between elements in the source markup as <code>Text</code> nodes in the DOM.<!--
-  not a conf criteria since the parser now requires this --> Empty <code>Text</code> nodes and
+  <p><span>ASCII whitespace</span> is always allowed between elements. User agents represent these
+  characters between elements in the source markup as <code>Text</code> nodes in the DOM.<!-- not a
+  conf criteria since the parser now requires this --> Empty <code>Text</code> nodes and
   <code>Text</code> nodes consisting of just sequences of those characters are considered
   <dfn>inter-element whitespace</dfn>.</p>