[css-position-3] More link fixups

Author: tabatkins

css-position-3/Overview.bs

@@ -105,6 +105,9 @@ urlPrefix: https://www.w3.org/TR/CSS2/visuren.html; spec: CSS2;
 urlPrefix: https://www.w3.org/TR/CSS21/media.html; spec: CSS2;
 	url: #continuous-media-group; text: continuous media; type: dfn;
 	url: #paged-media-group; text: paged media; type: dfn;
+urlPrefix: https://www.w3.org/TR/CSS2/visudet.html; spec: CSS2;
+	url: #static-position; text: static position; type: dfn;
+	url: #static-position; text: static-position containing block; type: dfn;
 </pre>
 
 <pre class=link-defaults>
@@ -765,7 +768,7 @@ Resolving Automatic Insets</h4>
 	</dl>
 
 	For the purposes of calculating the [=static position rectangle=],
-	the [=containing block=] of [=fixed positioned elements=]
+	the [=containing block=] of [=fixed positioned=] elements
 	is the [=initial containing block=] instead of the [=viewport=],
 	and all [=scroll containers=] should be assumed
 	to be scrolled to their [=initial scroll position=].