Editorial: use Infra's continue to clarify requestFullscreen()

The old meaning was a bit unclear, but could plausibly be read as continue.

Author: foolip

fullscreen.bs

@@ -243,15 +243,13 @@ these steps:
    <li><p>Let <var>eventDocs</var> be a new <a>ordered set</a>.
 
    <li>
-    <p><a>For each</a> <var>element</var> in <var>fullscreenElements</var>, run these
-    subsubsteps:
+    <p><a>For each</a> <var>element</var> in <var>fullscreenElements</var>:
 
     <ol>
      <li><p>Let <var>doc</var> be <var>element</var>'s <a>node document</a>.
 
      <li>
-      <p>If <var>element</var> is <var>doc</var>'s <a>fullscreen element</a>, terminate these
-      subsubsteps.
+      <p>If <var>element</var> is <var>doc</var>'s <a>fullscreen element</a>, <a>continue</a>.
 
       <p class=note>No need to notify observers when nothing has changed.