[css-pseudo-4] Only allow word separators preceding first letter. #9413

Author: fantasai

css-pseudo-4/Overview.bs

@@ -421,24 +421,27 @@ First Letters and Associated Punctuation
     
       All punctuation--
       i.e, characters that belong to the Punctuation (P*) Unicode general category [[!UAX44]]--
-      that precedes the [=first letter=].
+      that precedes the [=first letter=],
+      as well as any intervening typographic space--
+      characters belonging to the Zs Unicode general category [[!UAX44]]
+      other than
+      U+3000 IDEOGRAPHIC SPACE.
     
       Any punctuation other than opening punctuation and dashes--
       i.e. characters that belong to the Punctuation (P*) Unicode general category,
       excluding Open Punctuation (Ps)
       and Dash Punctuation (Pd)--
-      that follows the [=first letter=].
-    
-      Any intervening typographic space--
-      i.e. characters that belong to the Zs Unicode general category [[!UAX44]]--
+      that follows the [=first letter=],
+      as well as any intervening typographic space--
+      characters belonging to the Zs Unicode general category [[!UAX44]]
       other than
-      U+3000 IDEOGRAPHIC SPACE.
+      U+3000 IDEOGRAPHIC SPACE or a [=word separator=].
   
 
 
     Informally, the [=first-letter text=]’s pattern here
     can be roughly
-    (ignoring the exclusion from Zs)
+    (ignoring the exclusions from Zs)
     represented as a “regular expression”
     
 
@@ -1882,7 +1885,8 @@ Changes
        and 10213)
     Added ''::details-content'' pseudo-element
       (Issue 10379)
-    Allow space and no-break space to be part of ''::first-letter''.
+    Allow space and no-break space to be part of ''::first-letter''
+      when occuring before the [=first letter=].
       (Issue 9413)
     Renamed ''::postfix'' to ''::suffix''.
       (Issue Issue 11949)

css-text-3/Overview.bs

@@ -6057,7 +6057,7 @@ Word Spacing: the 'word-spacing' property
 	word-spacing/word-spacing-negative-value-001.html
 	
 
-	Word-separator characters
+	export id="word-separator" lt="word-separator character | word separator">Word-separator characters
 	are [=typographic character units=]
 	whose primary purpose and general usage is to separate words.
 	In Unicode this includes

css-text-4/Overview.bs

@@ -9922,7 +9922,7 @@ Word Spacing: the 'word-spacing' property
 	word-spacing/word-spacing-negative-value-001.html
 	
 
-	Word-separator characters
+	export id="word-separator" lt="word-separator character | word separator">Word-separator characters
 	are [=typographic character units=]
 	whose primary purpose and general usage is to separate words.
 	In Unicode this includes