[css-text-4] Fix typo #1668

Author: fantasai

css-text-4/Overview.bs

@@ -1197,7 +1197,7 @@ Fullwidth Punctuation Collapsing</h4>
 			Else set it full-width.
 	</ul>
 
-	ISSUE: The above handling of opening&mdash;closing bracket pairs
+	ISSUE: The above handling of closing&mdash;opening bracket pairs
 	matches [[JLREQ]]
 	but does not correctly handle the case of mismatched font sizes.
 	Earlier drafts trimmed 1/4 of each character, essentially averaging the spacing.