Use <a><i> for serializer

Author: noamr

fetch.bs

@@ -6813,7 +6813,7 @@ which is an algorithm that takes no arguments:
 <ol>
  <li><p>Let <var>totalRequestLength</var> be the <a for=string>length</a> of <var>request</var>'s
  <a for=request>URL</a>, <a lt="URL serializer">serialized</a> with
- [=URL serializer/exclude fragment=] set to true.
+ <a for="URL serializer"><i>exclude fragment</i></a> set to true.
 
  <li><p>Increment <var>totalRequestLength</var> by the <a for=string>length</a> of
  <var>request</var>'s <a for=request>referrer</a>, <a lt="URL serializer">serialized</a>.