Remove a trailing space.

Author: guohuideng2024

fetch.bs

@@ -5168,7 +5168,7 @@ steps:
      <li><p>Set <var>response</var>'s <a for=response>header list</a> to «
      (`<code>Content-Type</code>`, <var>mimeType</var>)».
 
-     <li><p>If <var>coding</var> is non-null,<a for="header list"> append</a> 
+     <li><p>If <var>coding</var> is non-null,<a for="header list"> append</a>
      (`<code>Content-Encoding</code>`, <var>coding</var>) to <var>response</var>'s
      <a for=response>header list</a>.