Add issue ref.

cssom-view-1/Overview.bs

@@ -413,7 +413,6 @@ This specification depends on the WHATWG Infra standard. [[!INFRA]]
 <h3 id=scrolling>Scrolling</h3>
 
 <div algorithm="perform a scroll of a box">
-<!-- @@@:done -->
 
 When a user agent is to <dfn export>perform a scroll</dfn> of a <a>scrolling box</a> <var>box</var>,
 to a given position <var>position</var>,
@@ -441,10 +440,10 @@ the following steps must be run:
 
   Note: If the scroll position did not change as a result of the user interaction or programmatic invocation, where no translations were applied as a result, then no <a event>scrollend</a> event fires because no scrolling occurred.
 
+Issue: What values to use when fulfilling programmatic scroll promises at scroll completion vs interruption? #12355
 </div>
 
 <div algorithm="perform a scroll of a viewport">
-<!-- @@@:done -->
 
 When a user agent is to <dfn for="viewport" export>perform a scroll</dfn> of a <a>viewport</a> to a given position <var>position</var> and optionally a scroll behavior <var>behavior</var>
 (which is "<code>auto</code>" if omitted) it must perform a coordinated viewport scroll by following these steps: