[css-values-3][editorial] Markup fixes

Author: fantasai

css-values-3/Overview.bs

@@ -20,6 +20,8 @@ Default Highlight: css
 </pre>
 <pre class='link-defaults'>
 spec: css-backgrounds-3; type: type; text: <position>
+spec: css-backgrounds-3; type: property; text: border-color
+spec: css-backgrounds-3; type: property; text: box-shadow
 spec: css2; type: property; text: border-collapse
 spec: css-color-4; type: value; text: currentcolor
 spec: infra; type: dfn; text: string
@@ -1411,7 +1413,7 @@ Absolute Lengths: the ''cm'', ''mm'', ''Q'', ''in'', ''pt'', ''pc'', ''px'' unit
 	are sometimes written like <code>2p3</code>,
 	indicating a length of 2 picas and 3 points.
 	These can be written in CSS as ''calc(2pc + 3pt)''
-	(see [[#calc-func]]).
+	(see [[#calc-notation]]).
 
 	All of the absolute length units are <a>compatible</a>,
 	and ''px'' is their <a>canonical unit</a>.