[css-display-3] Define replaced elements to always establish an independent formatting context. (Fundamentally editorial.) w3c#4539

Author: fantasai

css-display-3/Overview.bs

@@ -1351,6 +1351,7 @@ Appendix A: Glossary</h2>
 				For example, the content of the HTML <{img}> element
 				is often replaced by the image that its <{img/src}> attribute designates.
 			</span>
+
 			Replaced elements often have [=natural dimensions=].
 			For example, a bitmap image has a natural width and a natural height specified in absolute units
 			(from which the natural ratio can obviously be determined).
@@ -1365,6 +1366,7 @@ Appendix A: Glossary</h2>
 
 			The content of replaced elements is not considered in the CSS formatting model;
 			however, their [=natural dimensions=] are used in various layout calculations.
+			Replaced elements always establish an [=independent formatting context=].
 
 			A <dfn lt="non-replaced | non-replaced element">non-replaced</dfn> element is one that is not <a>replaced</a>,
 			i.e. whose rendering is dictated by the CSS model.