[css-sizing] Add shortened link text

Author: fantasai

css-sizing/Overview.bs

@@ -145,7 +145,7 @@ Auto Box Sizes</h3>
 			Note: For the <a>inline axis</a>, this is called the “available width” in <a href="http://www.w3.org/TR/CSS21/visudet.html#float-width">CSS2.1§10.3.5</a>
 			and computed by the rules in <a href="http://www.w3.org/TR/CSS21/visudet.html#blockwidth">CSS2.1§10.3.3</a>.
 
-		: <dfn>max-content size</dfn>
+		: <dfn lt="max-content | max-content size">max-content size</dfn>
 		:: A box’s “ideal” <a>size</a> in a given axis when given infinite available space.
 			Usually this is the smallest <a>size</a> the box could take in that axis
 			while still fitting around its contents,
@@ -164,7 +164,7 @@ Auto Box Sizes</h3>
 			:: The box's “ideal” <a>size</a> in the <a>block axis</a>.
 				Usually the <a>block size</a> of the content after layout.
 
-		: <dfn>min-content size</dfn>
+		: <dfn lt="min-content | min-content size">min-content size</dfn>
 		:: The smallest <a>size</a> a box could take
 			that doesn't lead to overflow
 			that could be avoided by choosing a larger <a>size</a>.