[css-text-3] Only collapsible Ogham space mark is removed. w3c#4893

Author: fantasai

css-text-3/Overview.bs

@@ -1553,7 +1553,7 @@ Text Processing</h3>
       <li>A sequence at the end of a line
         of <a>collapsible</a> [=spaces=]
         is removed,
-        and any trailing U+1680 OGHAM SPACE MARK
+        and any [=collapsible=] trailing U+1680 OGHAM SPACE MARK
         is also removed.
 
         <wpt>