[css-pseudo-4] Rename ::postfix to ::suffix #11949

* “Suffix” is the more common term.
* It also aligns with the @counter-style descriptors.

Author: fantasai

css-pseudo-4/Overview.bs

@@ -319,7 +319,7 @@ Inheritance and the ''::first-line'' Pseudo-element</h4>
 
 
 <h3 id="first-letter-pseudo">
-First-Letter Text: ''::first-letter'' pseudo-element and its ''::prefix'' and ''::postfix'' children</h3>
+First-Letter Text: ''::first-letter'' pseudo-element and its ''::prefix'' and ''::suffix'' children</h3>
 
   <wpt>
     first-letter-001.html
@@ -393,9 +393,9 @@ First-Letter Text: ''::first-letter'' pseudo-element and its ''::prefix'' and ''
   [=sub-pseudo-element=] of the ''::first-letter'' [=pseudo-element=]
   (''::first-letter::prefix'');
   and associated following punctuation
-  is represented by the <dfn for="::first-letter">::postfix</dfn>
+  is represented by the <dfn for="::first-letter">::suffix</dfn>
   [=sub-pseudo-element=] of the ''::first-letter'' [=pseudo-element=]
-  (''::first-letter::postfix'').
+  (''::first-letter::suffix'').
   See [[#first-letter-pattern]], below.
 
 <h4 id="first-letter-pattern">
@@ -561,7 +561,7 @@ Inheritance and Box Tree Structure of the First-Letter Pseudo-elements</h4>
     </pre>
   </div>
 
-  If any ''::first-letter::prefix'' or ''::first-letter::postfix'' [=pseudo-elements=] exist,
+  If any ''::first-letter::prefix'' or ''::first-letter::suffix'' [=pseudo-elements=] exist,
   they are nested within the innermost ''::first-letter'',
   and otherwise interpreted similar to ''::first-letter'' itself.
 
@@ -591,7 +591,7 @@ Inheritance and Box Tree Structure of the First-Letter Pseudo-elements</h4>
   are not all in the same element
   (as the <code>‘T</code> in <code class="lang-css">&lt;p&gt;‘&lt;em&gt;T...</code>),
   the user agent may create the ''::first-letter'' pseudo-element
-  (and its ''::prefix'' or ''::postfix'' sub-elements, if any)
+  (and its ''::prefix'' or ''::suffix'' sub-elements, if any)
   from one of the elements, or all elements,
   or simply not create the pseudo-element(s).
   Additionally, if the [=first-letter text=]
@@ -609,10 +609,10 @@ Inheritance and Box Tree Structure of the First-Letter Pseudo-elements</h4>
 Styling the First-Letter Pseudo-elements</h4>
 
   In CSS a ''::first-letter'' [=pseudo-element=]
-  (and its ''::prefix'' and ''::postfix'' sub-elements)
+  (and its ''::prefix'' and ''::suffix'' sub-elements)
   is similar to an [=inline box=].
   The following properties apply to
-  ''::first-letter'', ''::first-letter::prefix'', and ''::first-letter::postfix''
+  ''::first-letter'', ''::first-letter::prefix'', and ''::first-letter::suffix''
   pseudo-elements:
 
   <ul>
@@ -1512,7 +1512,7 @@ List Markers: the ''::marker'' pseudo-element</h3>
   and the computed value of 'display' on ''::marker''
   always loses any ''display/list-item'' aspect.
 
-  ISSUE: Should ''::marker'' also have ''::prefix'' and ''::postfix'' sub-elements?
+  ISSUE: Should ''::marker'' also have ''::prefix'' and ''::suffix'' sub-elements?
 
 <h3 id="placeholder-pseudo">
 Placeholder Input: the ''::placeholder'' pseudo-element</h3>
@@ -1883,6 +1883,8 @@ Changes</h2>
        and <a href="https://github.com/w3c/csswg-drafts/issues/10213">10213</a>)
     <li>Added ''::details-content'' pseudo-element
       (<a href="https://github.com/w3c/csswg-drafts/pull/10379">Issue 10379</a>)
+    <li>Renamed ''::postfix'' to ''::suffix''>
+      (Issue <a href="https://github.com/w3c/csswg-drafts/issues/11949">Issue 11949</a>)
     <li>Excluded inline layout properties from ''::placeholder''.
       (<a href="https://github.com/w3c/csswg-drafts/issues/5379">Issue 5379</a>)
     <li>Clarified that UAs must not tweak author-specified colors for [=highlight pseudo-elements=].