[css-counter-styles-3][editorial] Rephrase the OM descriptor parsing to use the CSS/parse algorithm rather than doing using bespoke language. #7040

Author: tabatkins

css-counter-styles-3/Overview.bs

@@ -2605,9 +2605,9 @@ The <code>CSSCounterStyleRule</code> interface</h3>
 
 			On setting, run the following steps:
 
-			1. <a>Parse a list of component values</a> from the value.
+			1. [=CSS/parse=] [=the given value=] as the descriptor associated with the attribute.
 
-			2. If the returned value is invalid according to the given descriptor's grammar,
+			2. If the result is invalid according to the given descriptor's grammar,
 				or would cause the ''@counter-style'' rule to become invalid,
 				do nothing and abort these steps.
 				(For example, some systems require the '@counter-style/symbols' descriptor to contain two values.)
@@ -2655,7 +2655,7 @@ Changes since the July 2021 Candidate Recommendation</h3>
 		(<a href="https://github.com/w3c/csswg-drafts/issues/8870">Issue 8870</a>)
 
 	* Fixed the accidental desync between disallowed name keywords in the syntax vs the OM.
-	(<a href="https://github.com/w3c/csswg-drafts/issues/8186">Issue 8186</a>)
+		(<a href="https://github.com/w3c/csswg-drafts/issues/8186">Issue 8186</a>)
 
 <h3 id='changes-2017'>
 Changes since the December 2017 Candidate Recommendation</h3>