[css-sizing-3] Merge paragraphs to clarify we're talking about min-width/height only. #3556

Author: fantasai

css-sizing-3/Overview.bs

@@ -385,7 +385,6 @@ Sizing Values: the <<length-percentage>>, ''width/auto'' | ''max-width/none'', '
 			Unless otherwise defined by the relevant layout module,
 			however,
 			it resolves to a used value of ''0''.
-
 			For backwards-compatibility,
 			the <a>resolved value</a> of this keyword is zero
 			for boxes of all [[!CSS2]] <a>display types</a>: