Editorial: share a conditional in fetch response handover

Also clean up an earlier internalResponse initialization.

fetch.bs

@@ -4591,8 +4591,8 @@ steps:
   </ol>
 
  <li><p>Let <var>internalResponse</var> be <var>response</var>, if <var>response</var> is a
- <a>network error</a>, and <var>response</var>'s <a for="filtered response">internal response</a>
- otherwise.
+ <a>network error</a>; otherwise <var>response</var>'s
+ <a for="filtered response">internal response</a>.
 
  <li>
   <p>If <var>internalResponse</var>'s <a for=response>URL list</a> <a for=list>is empty</a>, then
@@ -4752,17 +4752,16 @@ steps:
 
       <p class=note>This covers the case of <var>response</var> being a <a>network error</a>.
 
-     <li><p>Let <var>responseStatus</var> be 0 if <var>fetchParams</var>'s
-     <a for="fetch params">request</a>'s <a for=request>mode</a> is "<code>navigate</code>" and
-     <var>response</var>'s <a for=response>has-cross-origin-redirects</a> is true; otherwise
-     <var>response</var>'s <a for=response>status</a>.
+     <li><p>Let <var>responseStatus</var> be 0.
 
      <li>
       <p>If <var>fetchParams</var>'s <a for="fetch params">request</a>'s <a for=request>mode</a> is
       not "<code>navigate</code>" or <var>response</var>'s
       <a for=response>has-cross-origin-redirects</a> is false:
 
       <ol>
+       <li><p>Set <var>responseStatus</var> to <var>response</var>'s <a for=response>status</a>.
+
        <li><p>Let <var>mimeType</var> be the result of
        <a for="header list">extracting a MIME type</a> from <var>response</var>'s
        <a for=response>header list</a>.