Make hierarchy tests 100% self-covering; fix bugs

Author: jfirebaugh

lib/hierarchy.js

@@ -78,9 +78,8 @@ function inferHierarchy(comments) {
 
     default:
       if (!comment.scope) {
-        parent.errors.push({
-          message: 'found memberof but no @scope, @static, or @instance tag',
-          commentLineNumber: memberOfTagLineNumber
+        comment.errors.push({
+          message: 'found memberof but no @scope, @static, or @instance tag'
         });
         continue;
       }