Typo fixes

Author: xfq

css-2015/Overview.bs

@@ -84,7 +84,7 @@ Background: The W3C Process and CSS</h3>
  			The CSSWG transitions Working Drafts once we have resolved all known issues,
  			and can make no further progress without feedback from building tests and implementations.
 
-			This ”Last Call for Comments” sets a deadline for reporting any outstanding issues,
+			This “Last Call for Comments” sets a deadline for reporting any outstanding issues,
 			and requires the WG to specially track and address incoming feedback.
 			The comment-tracking document is the Disposition of Comments (DoC).
 			It is submitted along with an updated draft for the Director's approval,

css-2017/Overview.bs

@@ -85,7 +85,7 @@ Background: The W3C Process and CSS</h3>
  			The CSSWG transitions Working Drafts once we have resolved all known issues,
  			and can make no further progress without feedback from building tests and implementations.
 
-			This ”Last Call for Comments” sets a deadline for reporting any outstanding issues,
+			This “Last Call for Comments” sets a deadline for reporting any outstanding issues,
 			and requires the WG to specially track and address incoming feedback.
 			The comment-tracking document is the Disposition of Comments (DoC).
 			It is submitted along with an updated draft for the Director's approval,