[css-inline] reword comment in example for clarity

Author: dauwhe

css-inline/Overview.bs

@@ -331,7 +331,7 @@ Initial letters are typically a single letter, which can be selected by the <cod
   <pre>
     ::first-letter, /* style first paragraph's T */
     img, /* style illuminated H */
-    span /* drop Words may also */
+    span /* style phrase inside span */
     { initial-letter: 2; }
   </pre>
 </div>