Address some review comments

source

@@ -58356,14 +58356,11 @@ o............A....e
   are generally ignored. (In some cases the `<code data-x="">charset</code>` parameter has an
   effect.) However, for the <code>script</code> element's <code
   data-x="attr-script-type">type</code> attribute they are significant; it uses the <span>JavaScript
-  MIME type essence match</span> concept. (In general, it is best not to think of the
-  <code>script</code> element's <code data-x="attr-script-type">type</code> attribute as related to
-  MIME types; instead, it has a hard-coded list of strings, which resemble certain MIME types, that
-  for historical reasons will trigger the same default behavior as omitting the attribute.)</p>
+  MIME type essence match</span> concept.</p>
 
   <p class="note">For example, scripts with their <code data-x="attr-script-type">type</code>
   attribute set to "<code data-x="">text/javascript; charset=utf-8</code>" will not be
-  evaluated, even though that is a valid <span>JavaScript MIME type</span>.</p>
+  evaluated, even though that is a valid <span>JavaScript MIME type</span> when parsed.</p>
 
   <p>Furthermore, again for external JavaScript resources, special considerations apply around
   `<code>Content-Type</code>` header processing as detailed in the <span>prepare a script</span>