[css-pseudo-4][css-highlight-api-1] Clean up redundancies in linkage. w3c#6755

Author: fantasai

css-highlight-api-1/Overview.bs

@@ -304,15 +304,12 @@ Styling Custom Highlights</h2>
 <h3 id=custom-highlight-pseudo>
 The Custom Highlight Pseudo-element: ''::highlight()''</h3>
 
-	The <dfn>::highlight(<<custom-highlight-name>>)</dfn> pseudo-element
+	The ''::highlight()'' pseudo-element
 	(also known as the <dfn>custom highlight pseudo-element</dfn>)
 	represents the portion of a document that
 	is being [=contained=] or [=partially contained=]
 	in all the [=ranges=] of the [=registered=] [=custom highlight=]
-	with the [=custom highlight name=] <<custom-highlight-name>>,
-	if any.
-	<dfn type><<custom-highlight-name>></dfn> must be a valid CSS <<ident-token>>.
-
+	with the [=custom highlight name=] specified as its argument.
 
 <h3 id=processing-model>
 Processing Model</h3>

css-pseudo-4/Overview.bs

@@ -640,7 +640,7 @@ Styling the First-Letter Pseudo-elements</h4>
 Highlight Pseudo-elements</h2>
 
 <h3 id="highlight-selectors">
-Selecting Highlighted Content: the ''::selection'',  ''::target-text'', ''::spelling-error'', ''::grammar-error'', and ''::highlight'' pseudo-elements</h3>
+Selecting Highlighted Content: the ''::selection'',  ''::target-text'', ''::spelling-error'', ''::grammar-error'', and ''::highlight()'' pseudo-elements</h3>
 
   <wpt>
     grammar-spelling-errors-001.html
@@ -793,10 +793,12 @@ Selecting Highlighted Content: the ''::selection'',  ''::target-text'', ''::spel
       grammar-error-003-manual.html
       </wpt>
 
-    <dt><dfn>::highlight()</dfn>
+    <dt><dfn>::highlight(<<custom-ident>>)</dfn>
     <dd>
-      The ''::highlight()'' [=functional pseudo-element=] represents content associated with [=custom highlights=].
-      Each [=custom highlight name=] represents a different type of highlight.
+      The ''::highlight()'' [=functional pseudo-element=] represents
+      the portion of the document associated with the [=custom highlight=]
+      identified by the given [=custom highlight name=].
+      The <<custom-ident>> argument is required.
       See [[CSS-HIGHLIGHT-API-1]] for details.
       <wpt>
       css/css-highlight-api/painting/custom-highlight-painting-001.html