[css-sizing-3] fix markup

Author: tabatkins

css-sizing-3/Overview.bs

@@ -93,8 +93,8 @@ Terminology</h2>
 				<img style="max-width: 49%;" src="images/sizing-ltr-tb.svg"
 				     alt="In left-to-right, top-to-bottom horizontal English,
 				          the horizontal width and inline size are synonymous,
-				          and vertical height and block size are synonymous."
-				><img style="max-width: 49%;" src="images/sizing-ttb-rl.svg"
+				          and vertical height and block size are synonymous."><!--
+				--><img style="max-width: 49%;" src="images/sizing-ttb-rl.svg"
 				      alt="In top-to-bottom, right-to-left vertical Japanese,
 				           the horizontal width and block size are synonymous,
 				           and vertical height and inline size are synonymous.">