diff --git a/packages/@aws-cdk/service-spec-importers/src/diff-fmt.ts b/packages/@aws-cdk/service-spec-importers/src/diff-fmt.ts
index d596d24f..b98df44b 100644
--- a/packages/@aws-cdk/service-spec-importers/src/diff-fmt.ts
+++ b/packages/@aws-cdk/service-spec-importers/src/diff-fmt.ts
@@ -53,8 +53,8 @@ export class DiffFormatter {
       listWithCaption(
         'resources',
         [...this.dbs[db].follow('hasResource', s)]
-        .sort(sortByKey(e => e.entity.name))
-        .map((e) => this.renderResource(e.entity, db).prefix([' '])),
+          .sort(sortByKey((e) => e.entity.name))
+          .map((e) => this.renderResource(e.entity, db).prefix([' '])),
       ),
     ]);
   }