[scroll-animations-1] Tweak wording

Author: fantasai

css-display-4/Overview.bs

@@ -862,9 +862,9 @@ Animating and Interpolating 'display'</h3>
 
 	In general,
 	the 'display' property’s [=animation type=] is [=discrete=].
-	However--
-	similar to when animating 'visibility'
-	(see [[web-animations-1#animating-visibility]])--
+	However,
+	similar to interpolation of 'visibility'
+	(see [[web-animations-1#animating-visibility]]),
 	during interpolation between ''display/none''
 	and any other 'display' value,
 	<var>p</var> values between 0 and 1