[css-position-3] dfn weaker inset

Author: fantasai

css-position-3/Overview.bs

@@ -659,11 +659,11 @@ Absolute Positioning</h3>
 
 	If these adjustments result in
 	an effective [=containing block=] size in any axis less than zero,
-	then the weaker inset in the affected axis
+	then the [=weaker inset=] in the affected axis
 	is reduced to bring that size up to zero.
 	In the case that only one inset is ''auto'',
-	that is the weaker inset;
-	otherwise the weaker inset is the end-edge inset.
+	that is the <dfn>weaker inset</dfn>;
+	otherwise the [=weaker inset=] is the end-edge inset.
 
 	Sizing and positioning of the [=absolutely positioned box=]
 	into this <dfn>inset-modified containing block</dfn>