Editorial: rephrase initEvent() note

Fixes #906.

Author: annevk

dom.bs

@@ -801,7 +801,7 @@ method, when invoked, must run these steps:</p>
  <var>cancelable</var>.
 </ol>
 
-<p class="note no-backref">As <a>events</a> have constructors {{Event/initEvent()}} is redundant and
+<p class="note no-backref">{{Event/initEvent()}} is redundant with <a>event</a> constructors and
 incapable of setting {{Event/composed}}. It has to be supported for legacy content.