[css-anchor-position][editorial] fix markup

Author: tabatkins

css-anchor-position-1/Overview.bs

@@ -27,6 +27,10 @@ spec:css-cascade-5; type:dfn; text:property
 spec:dom; type:dfn; text:shadow tree
 </pre>
 
+<pre class=anchors>
+spec:aria-1.3; type: element-attr; text: role; for: html-global; url: https://w3c.github.io/aria/#host_general_role
+</pre>
+
 <style>
 /* Put nice boxes around each algorithm. */
 [data-algorithm]:not(.heading) {
@@ -670,6 +674,7 @@ is ''align-self/normal'':
 		<figcaption>
 			An example of ''inset-area: span-x-start top'' positioning.
 		</figcaption>
+	</figure>
 </div>
 
 Note: When the [=default anchor element=]
@@ -1849,7 +1854,7 @@ laying out later elements cannot change this decision.
 	At the time that {{ResizeObserver}} events are determined and delivered:
 
 	* If an element |el| is [=absolutely positioned=],
-		set its [=last successful position option=]
+		set its <dfn export>last successful position option</dfn>
 		to the set of [=accepted @position-try properties=] (and values)
 		that it's currently using.