Apply suggestion from @whimboo

Co-authored-by: Henrik Skupin <mail@hskupin.info>

Author: 2 people

index.html

@@ -5485,8 +5485,7 @@ <h3>State</h3>
  <li><p>Return a pair of (<var>x</var>, <var>y</var>).
 </ol>
 
-<p>To determine if <var>node</var> is <dfn>not in the same tree</dfn>
- as another {{Node}}, <var>other</var>,
+<p>To determine if a {{Node}} <var>node</var> is <dfn>not in the same tree</dfn> as a {{Node}} <var>other</var>,
  run the following substeps:
 
 <ol>