[css-values-4] Teensy negative lengths will round to -1 #13794

Author: tabatkins

css-values-4/Overview.bs

@@ -1805,7 +1805,7 @@ Distance Units: the <<length>> type</h2>
 			do nothing.
 
 		2. If the absolute value of |len| is greater than zero, but less than 1 [=device pixel=],
-			round it away from zero to 1 [=device pixel=].
+			round it away from zero to 1 or -1 [=device pixel=].
 
 		4. If the absolute value of |len| is greater than 1 [=device pixel=],
 			round it towards zero to the nearest integer number of [=device pixels=].