[css-fonts-4][editorial] bikeshed autolink syntax

Author: svgeesus

css-fonts-4/Overview.bs

@@ -624,7 +624,7 @@ Generic font families</h4>
 			unlike UAs that generally allow users to customise the generic ''sans-serif'' or ''serif'' font family.
 			As the name implies, ''system-ui'' is intended for use with UI elements in web application, and not for large paragraphs of text or articles.
 
-		<dt id="math-def"><dfn>math</dfn>
+		<dt id="math-def"><dfn for=font-family>math</dfn>
 		<dd>
 			This font family is intended for use with mathematical expressions.
 
@@ -1433,7 +1433,7 @@ Font size: the 'font-size' property</h3>
 			Note: Use of percentage values or <a>font-relative lengths</a>
 			such as ''em''s and ''rem''s
 			leads to more robust and cascadable style sheets.
-		<dt><dfn value for=font-size>math</dfn></dt>
+		<dt id="font-size-math"><dfn value for=font-size>math</dfn></dt>
 		<dd>
 			Special <a href="https://w3c.github.io/mathml-core/#the-math-script-level-property">
 			mathematical scaling rules</a> must be applied