Fix prettier (#20827)

public/app/plugins/panel/graph/specs/graph_ctrl.test.ts

@@ -118,15 +118,24 @@ describe('GraphCtrl', () => {
       const data = [
         {
           target: 'test.normal',
-          datapoints: [[10, 1], [10, 2]],
+          datapoints: [
+            [10, 1],
+            [10, 2],
+          ],
         },
         {
           target: 'test.nulls',
-          datapoints: [[null, 1], [null, 2]],
+          datapoints: [
+            [null, 1],
+            [null, 2],
+          ],
         },
         {
           target: 'test.zeros',
-          datapoints: [[0, 1], [0, 2]],
+          datapoints: [
+            [0, 1],
+            [0, 2],
+          ],
         },
       ];
       ctx.ctrl.onDataSnapshotLoad(data);