Addressing more review comments

Author: jimevanssfdc

index.html

@@ -4387,7 +4387,7 @@ <h3 id=shadow-root>Shadow Roots</h3>
     <li>Return <a>success</a> with <var>shadow</var>.
    </ol>
 
-   <p>To <dfn data-lt="create a shadow root">create a shadow root reference</dfn>
+   <p>To <dfn data-lt="create a shadow root|a new shadow root reference">create a shadow root reference</dfn>
     for a <a><var>shadow root</var></a>:
 
    <ol>
@@ -5067,7 +5067,7 @@ <h4><dfn>Get Element Shadow Root</dfn></h4>
     <a>own property</a> named "host" of <var>shadow root</var>.
 
   <li><p>If <var>shadow host</var> is not undefined or null, return
-    <a>create a shadow root reference</a>.
+    <a>a new shadow root reference</a>.
 
   <p>Otherwise, return <a>error</a> with <a>error code</a> <a>no such shadow root</a>.
 </ol>