[css-scroll-snap] More bikeshed fixes

Author: fantasai

css-scroll-snap/Overview.bs

@@ -436,9 +436,9 @@ Scroll Snapping Alignment: the 'scroll-snap-align' property {#scroll-snap-align}
 
 	<pre class="propdef">
 	Name: scroll-snap-align
-	Value: [ none | edges | <alignment> ] {1,2} |
-         [ block | inline]  [ none | edges | <alignment> ] |
-         point <alignment>{1,2}
+	Value: [ none | edges | <<alignment>> ] {1,2} |
+         [ block | inline]  [ none | edges | <<alignment>> ] |
+         point <<alignment>>{1,2}
 	Initial: none
 	Applies to: all elements
 	Inherited: no