Fix nesting of getSubGraphTitleMargins test.

packages/mermaid/src/utils.spec.ts

@@ -595,8 +595,9 @@ describe('calculatePoint', () => {
       'Could not find a suitable point for the given distance'
     );
   });
+});
 
-  describe('getSubGraphTitleMargins', () => {
+describe('getSubGraphTitleMargins', () => {
   it('should get subgraph title margins after config has been set', () => {
     const config_0 = {
       flowchart: {
@@ -614,5 +615,4 @@ describe('calculatePoint', () => {
       subGraphTitleTotalMargin: 15,
     });
   });
-  });
 });