Update fetch.bs

Co-authored-by: Anne van Kesteren <[email protected]>

Author: fmarier

fetch.bs

@@ -2824,9 +2824,9 @@ given a <a for=/>request</a> <var>request</var>, run these steps:
  with <var>request</var>.
 
  <li><p>If <var>request</var>'s <a for=request>current URL</a>'s <a for=url>origin</a>'s
- <a for=origin>host</a> ends with <code>.onion</code> or <code>.onion.</code> [[ONION]], and
+ <a for=origin>host</a> ends with "<code>.onion</code>" or "<code>.onion.</code>", and
  is not <a>same origin</a> with <var>request</var>'s <a for=request>origin</a>, then set
- <var>serializedOrigin</var> to `<code>null</code>`.
+ <var>serializedOrigin</var> to `<code>null</code>`. [[ONION]]
 
  <li><p>If <var>request</var>'s <a for=request>response tainting</a> is "<code>cors</code>" or
  <var>request</var>'s <a for=request>mode</a> is "<code>websocket</code>", then