[css-view-transitions-2] Allow pseudo-element with class and no * (#1…

…0153)

Based on resolution:
#9874 (comment)

Closes #9874

css-view-transitions-2/Overview.bs

@@ -631,17 +631,18 @@ div.box {
  are extended to support the following syntax:
 
  <pre class=prod>
- ::view-transition-group(<<pt-name-selector>><<pt-class-selector>>)
- ::view-transition-image-pair(<<pt-name-selector>><<pt-class-selector>>)
- ::view-transition-old(<<pt-name-selector>><<pt-class-selector>>)
- ::view-transition-new(<<pt-name-selector>><<pt-class-selector>>)
+ ::view-transition-group(<<pt-name-and-class-selector>>)
+ ::view-transition-image-pair(<<pt-name-and-class-selector>>)
+ ::view-transition-old(<<pt-name-and-class-selector>>)
+ ::view-transition-new(<<pt-name-and-class-selector>>)
  </pre>
 
  where <<pt-name-selector>> works as previously defined, and
- <<pt-class-selector>> has the following syntax definition:
+ <<pt-name-and-class-selector>> has the following syntax definition:
 
  <pre class=prod>
- <dfn>&lt;pt-class-selector></dfn> = ['.' <<custom-ident>>]*
+ <dfn>&lt;pt-name-and-class-selector></dfn> = <<pt-name-selector>><<pt-class-selector>>? | <<pt-class-selector>>
+ <dfn>&lt;pt-class-selector></dfn> = ['.' <<custom-ident>>]+
  </pre>
 
  A [=named view transition pseudo-element=] [=selector=] which has one or more <<custom-ident>> values