Link to the definition of parsing.

Author: tabatkins

selectors/Overview.bs

@@ -3066,6 +3066,8 @@ Calculating a selector's specificity</h2>
 <h2 id="grammar" oldids="formal-syntax">
 Grammar</h2>
 
+	Selectors are [=CSS/parsed=] according to the following grammar:
+
 	<pre class=prod>
 	<dfn>&lt;selector-list></dfn> = <<complex-selector-list>>