fix

Author: sadym-chromium

fetch.bs

@@ -1428,13 +1428,10 @@ browsers.
  <li><p>Let <var>userAgent</var> be the <a>WebDriver BiDi emulated User-Agent</a> for
  <var>environment</var>.
 
- <li><p>If <var>userAgent</var> is not null, then set <var>userAgent</var> to
- <a>isomorphic encoded</a> <var>userAgent</var>.
+ <li><p>If <var>userAgent</var> is not null, then return <a>isomorphic encoded</a>
+ <var>userAgent</var>.
 
- <li><p>Otherwise, set <var>userAgent</var> to <a>default `<code>User-Agent</code>` value</a>.
-
- <li><p><a for="header list">Append</a> (`<code>User-Agent</code>`, <var>userAgent</var>) to
- <var>httpRequest</var>'s <a for=request>header list</a>.
+ <li><p>Return <a>default `<code>User-Agent</code>` value</a>.
 </ol>
 </div>