Address comment

Author: lukewarlow

dom.bs

@@ -6393,7 +6393,7 @@ boolean <var>validate</var> (default true), run these steps:
 
 <ol>
  <li>
-  <p>If <var>validate</var>, then:
+  <p>If <var>validate</var> is true, then:
   <ol>
    <li><p><a>Validate and set attribute value</a>
    <var>attribute</var>'s <a for="Attr">value</a> for <var>attribute</var> with <var>element</var>.