[css-pseudo] <dfn> for first-letter

Author: fantasai

css-pseudo/Overview.bs

@@ -211,7 +211,7 @@ Inheritance and the ''::first-line'' Pseudo-element</h4>
 <h3 id="first-letter-pseudo">
 The ::first-letter pseudo-element</h3>
 
-  The ''::first-letter'' pseudo-element represents
+  The <dfn>::first-letter</dfn> pseudo-element represents
   the first <i>typographic letter unit</i> [[!CSS3TEXT]]
   on the <i>first formatted line</i> of its <i>originating element</i>,
   if it is not preceded by any other content