Move migrations and fix typo.

app/controllers/admin/courseware.php

@@ -68,7 +68,7 @@ class Admin_CoursewareController extends AuthenticatedController
         $changed = array_sum(
             array_map(
                 fn ($blockType) => $blockType::activate() ? 1 : 0,
-                $requestedBlockTypes)
+                $requestedBlockTypes
             )
         );