[css-cascade] Sync 631c44c to all levels

Author: fantasai

css-cascade-3/Overview.bs

@@ -288,7 +288,7 @@ Resetting All Properties: the 'all' property</h3>
 	[[css-writing-modes-3]]
 
 	<div class='example'>
-		For example, if an author specifies ''all: initial'' on an element
+		For example, if an author specifies ''all: initial'' on an element,
 		it will block all inheritance and reset all properties,
 		as if no rules appeared in the author, user, or user-agent levels of the cascade.
 

css-cascade-5/Overview.bs

@@ -408,7 +408,7 @@ Resetting All Properties: the 'all' property</h3>
 	[[css-writing-modes-3]]
 
 	<div class='example'>
-		For example, if an author specifies ''all: initial'' on an element
+		For example, if an author specifies ''all: initial'' on an element,
 		it will block all inheritance and reset all properties,
 		as if no rules appeared in the author, user, or user-agent levels of the cascade.