tweaked rniwa wording

Author: annevk

dom.bs

@@ -1201,8 +1201,9 @@ for discussion).
  <a>relatedTarget</a> against <var>target</var> if <var>event</var>'s <a>relatedTarget</a> is
  non-null, and null otherwise.
 
- <li><p>If <var>event</var>'s {{Event/isTrusted}} attribute is true and <var>target</var> is
- <var>relatedTarget</var>, then terminate these steps.
+ <li><p>If <var>event</var>'s {{Event/isTrusted}} attribute is true, <var>target</var> is
+ <var>relatedTarget</var>, and <var>target</var> is not <var>event</var>'s <a>relatedTarget</a>,
+ then terminate these steps.
 
  <li><p>Append (<var>target</var>, <var>targetOverride</var>, <var>relatedTarget</var>) to <var>event</var>'s
  <a for=Event>path</a>.

dom.html

@@ -881,7 +881,8 @@ <h3 class="heading settled" data-level="3.8" id="dispatching-events"><span class
     <li>Let <var>relatedTarget</var> be the result of <a data-link-type="dfn" href="#retarget">retargeting</a> <var>event</var>’s <a data-link-type="dfn" href="#event-relatedtarget">relatedTarget</a> against <var>target</var> if <var>event</var>’s <a data-link-type="dfn" href="#event-relatedtarget">relatedTarget</a> is
  non-null, and null otherwise. 
     <li>
-     <p>If <var>event</var>’s <code class="idl"><a data-link-type="idl" href="#dom-event-istrusted">isTrusted</a></code> attribute is true and <var>target</var> is <var>relatedTarget</var>, then terminate these steps. </p>
+     <p>If <var>event</var>’s <code class="idl"><a data-link-type="idl" href="#dom-event-istrusted">isTrusted</a></code> attribute is true, <var>target</var> is <var>relatedTarget</var>, and <var>target</var> is not <var>event</var>’s <a data-link-type="dfn" href="#event-relatedtarget">relatedTarget</a>,
+ then terminate these steps. </p>
     <li>
      <p>Append (<var>target</var>, <var>targetOverride</var>, <var>relatedTarget</var>) to <var>event</var>’s <a data-link-type="dfn" href="#event-path">path</a>. </p>
     <li>