[css-inline] clarify which properties apply to initial-letter. See w3c#2700

Author: dauwhe

css-inline-3/Overview.bs

@@ -568,20 +568,14 @@ Creating Initial Letters: the 'initial-letter' property</h3>
 <h4 id="initial-letter-properties">
 Properties</h4>
 
-	The following properties apply to an <a>initial letter</a>:
-
-	<ul>
-		<li>all font properties (see [[CSS3-FONTS]])
-		<li>the 'color' and 'opacity' properties (see [[CSS3COLOR]])
-		<li>all background properties (see [[CSS3BG]])
-		<li>any typesetting properties that apply to inline elements (see [[CSS3TEXT]])
-		<li>all text decoration properties (see [[CSS3-TEXT-DECOR]])
-		<li>all margin, border and padding properties  (see [[CSS2]] and [[CSS3BG]])
-	</ul>
-
-	Note: Which properties apply to <a>initial letter</a>
-	depend on whether it is an inline box or an <a>initial letter</a> box,
-	as <a>initial letter</a> is a display type.
+	All properties that apply to an <a>inline box</a>
+	also apply to an <a>initial letter</a> 
+	(unless it is an <a>atomic inline</a>,
+	in which case the set of properties that apply to an <a>atomic inline</a> apply)
+	except for 'vertical-align' and its <a>sub-properties</a>.
+	<!-- Basically, any properties defined in css-inline
+	except those specific to initial letters,
+	so keep this list updated as we add things to this spec. -->
 
 	Issue: Add 'width'/'height' as requested by Tantek... need to integrate with model.
 	See GitHub issue <a href="https://github.com/w3c/csswg-drafts/issues/863">863</a>