Editorial: correct extracting reference

Fixes #1065.

dom.bs

@@ -8799,7 +8799,7 @@ check first thing, which matches everyone but Firefox.
   <p class=note>For historical reasons {{CharacterData}}
   <a for=/>nodes</a> are not checked here and end up throwing later on as a side effect.
 
- <li><p>Let <var>fragment</var> be the result of <a lt="live range">extracting</a> <a>this</a>.
+ <li><p>Let <var>fragment</var> be the result of <a for="live range">extracting</a> <a>this</a>.
  <!-- If the range contains a DocumentType, Firefox 4.0 and Opera 11.00 don't
  immediately throw here. Firefox removes the non-DocumentType nodes and
  throws, Opera removes all nodes and doesn't throw. This applies to