Rephrase and capitalise

source

@@ -72494,7 +72494,7 @@ END:VCARD</pre>
 
   <ul>
    <li>
-    <p>the user agent must not fire any of the following events on the node:</p>
+    <p>The user agent must not fire any of the following events on the node:</p>
     <ul>
      <li><p><code data-x="event-blur">blur</code></p></li>
      <li><p><code data-x="event-focus">focus</code></p></li>
@@ -72526,9 +72526,10 @@ END:VCARD</pre>
    </li>
 
    <li>
-    <p>if the <span>inert</span> element is the <span data-x="topmost-event-target">topmost event
-    target</span> for one of the above events, which would be fired as a result of user input, an
-    alternative <span data-x="event-target">event target</span> must be found as follows:</p>
+    <p>If one of the following events would be fired as a result of user input, such that the
+    <span>inert</span> element would be the <span data-x="topmost-event-target">topmost event
+    target</span>, an alternative <span data-x="event-target">event target</span> must be found as
+    follows:</p>
     <ol>
      <li><p>Let <var>originalElement</var> be the <span data-x="topmost-event-target">topmost event
      target</span> for the event.</p></li>
@@ -72550,10 +72551,10 @@ END:VCARD</pre>
     </ol>
    </li>
 
-   <li><p>the user agent may ignore the node for the purposes of text search user interfaces
+   <li><p>The user agent may ignore the node for the purposes of text search user interfaces
    (commonly known as "find in page"); and</p></li>
 
-   <li><p>the user agent may prevent the user from selecting text in that node.</p></li>
+   <li><p>The user agent may prevent the user from selecting text in that node.</p></li>
   </ul>
 
   <p>User agents should allow the user to override the restrictions on search and text selection,