[css-fonts-4] Font matching algorithm for font-stretch is not backwards-compatible

w3c#1333

Author: litherum

css-fonts-4/Overview.bs

@@ -1924,7 +1924,7 @@ at least as dark as its predecessor. Only values greater than 0 and less than 10
 		are removed from the matching set. If there is no face
 		which contains the desired value, a stretch value is chosen using the rules below:
 		  <ul>
-		    <li>If the desired stretch value is less than 100, stretch values below the
+		    <li>If the desired stretch value is less than or equal to 100, stretch values below the
 		    desired stretch value are checked in descending order followed by
 		    stretch values above the desired stretch value in ascending order until a
 		    match is found.</li>