[css-sizing-3] Fix error in algo; link to original email message defining algo https://lists.w3.org/Archives/Public/www-style/2009Nov/0286.html

Author: tabatkins

css-sizing-3/Overview.bs

@@ -409,17 +409,20 @@ Extrinsic Size Determination</h2>
 <h3 id="stretch-fit-sizing">
 Stretch-fit Sizing</h3>
 
-	<p>
 		The inner <a>stretch-fit inline size</a> of a box is&hellip;
+
+		<!-- Based on https://lists.w3.org/Archives/Public/www-style/2009Nov/0286.html -->
+
 		<ul>
 			<li>
 				If the box is the root or is absolutely-positioned, the inline-size of its containing block, else
 			<li>
-				<code>max(<a>min-content inline size</a>|0, min(<a>max-content inline size</a>|infinity, <a>inline size</a>|<a>stretch-fit inline size</a>))</code>
+				<code>max(<a>min inline size</a>|0, min(<a>max inline size</a>|infinity, <a>inline size</a>|<a>stretch-fit inline size</a>))</code>
 				where the sizes are inner inline-sizes of the element establishing the box's <a>containing block</a>,
 				and where the first value is used if it is <a>definite</a> and the second value otherwise.
 		</ul>
-	<p>
+
+
 		&hellip;less the box's <a>inline-axis</a> margins
 		(after any <a href="https://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin collapsing</a>, and treating ''margin/auto'' margins as zero),
 		borders, and padding,