chore(*): fix tslint newline error #8119

Author: zdrawku

projects/igniteui-angular/src/lib/test-utils/grid-mch-samples.spec.ts

@@ -656,4 +656,4 @@ export class NestedColGroupsWithTemplatesGridComponent {
     dynamicColGroupTemplate: TemplateRef<any>;
 
     data = SampleTestData.contactInfoDataFull();
-}
+}