Editorial: Use list to describe Intl object

Use `ul` list to describe the Intl object.

This matches the style used in ECMA-262.

Also add dfn for "Intl object" to allow linking.

Author: anba

spec/intl.html

@@ -1,12 +1,17 @@
 <emu-clause id="intl-object">
   <h1>The Intl Object</h1>
-  <p>The Intl object is the <dfn>%Intl%</dfn> intrinsic object and the initial value of the *"Intl"* property of the global object. The Intl object is a single ordinary object.</p>
 
-  <p>The value of the [[Prototype]] internal slot of the Intl object is the intrinsic object %Object.prototype%.</p>
-
-  <p>The Intl object is not a function object. It does not have a [[Construct]] internal method; it is not possible to use the Intl object as a constructor with the `new` operator. The Intl object does not have a [[Call]] internal method; it is not possible to invoke the Intl object as a function.</p>
-
-  <p>The Intl object has an internal slot, [[FallbackSymbol]], which is a new %Symbol% in the current realm with the [[Description]] *"IntlLegacyConstructedSymbol"*.</p>
+  <p>The <dfn>Intl object</dfn>:</p>
+  <ul>
+    <li>is <dfn>%Intl%</dfn>.</li>
+    <li>is the initial value of the *"Intl"* property of the global object.</li>
+    <li>is an ordinary object.</li>
+    <li>has a [[Prototype]] internal slot whose value is %Object.prototype%.</li>
+    <li>is not a function object.</li>
+    <li>does not have a [[Construct]] internal method; it cannot be used as a constructor with the `new` operator.</li>
+    <li>does not have a [[Call]] internal method; it cannot be invoked as a function.</li>
+    <li>has a [[FallbackSymbol]] internal slot, which is a new %Symbol% in the current realm with the [[Description]] *"IntlLegacyConstructedSymbol"*.</li>
+  </ul>
 
   <emu-clause id="sec-value-properties-of-the-intl-object">
     <h1>Value Properties of the Intl Object</h1>