[css-pseudo-4] Allow U+0020 and U+00A0 in ::first-letter #9413

Author: fantasai

css-pseudo-4/Overview.bs

@@ -430,17 +430,16 @@ First Letters and Associated Punctuation
       that follows the [=first letter=].
     
       Any intervening typographic space--
-      i.e. characters that belong to the Zs Unicode general category [[!UAX44]]
+      i.e. characters that belong to the Zs Unicode general category [[!UAX44]]--
       other than
-      U+3000 IDEOGRAPHIC SPACE or
-      any word-separator characters
+      U+3000 IDEOGRAPHIC SPACE.
   
 
 
     Informally, the [=first-letter text=]’s pattern here
     can be roughly
-    (ignoring the exclusions from Zs)
-    represented as the regular expression
+    (ignoring the exclusion from Zs)
+    represented as a “regular expression”
     
 
     or, alternatively,
@@ -1883,7 +1882,9 @@ Changes
        and 10213)
     Added ''::details-content'' pseudo-element
       (Issue 10379)
-    Renamed ''::postfix'' to ''::suffix''>
+    Allow space and no-break space to be part of ''::first-letter''.
+      (Issue 9413)
+    Renamed ''::postfix'' to ''::suffix''.
       (Issue Issue 11949)
     Excluded inline layout properties from ''::placeholder''.
       (Issue 5379)