[css-inline] better language for shape-outside #885

Author: dauwhe

css-inline-3/Overview.bs

@@ -948,7 +948,7 @@ Initial Letter Wrapping: the 'initial-letter-wrap' property</h3>
 			plus the amount of the <a>initial letter</a>’s end-side border+padding+margin.
 
 			If the value of ''shape-outside'' is not ''none'', 
-			''shape-outside'' is used instead of the glyph margin.
+			''shape-outside'' is used instead of the glyph outline.
 			</dd>
 
 			Note: This value is at-risk.