chore(*): fix tslint #8562

Author: hanastasov

projects/igniteui-angular/src/lib/grids/grid/grid-filtering-ui.spec.ts

@@ -5334,7 +5334,7 @@ describe('IgxGrid - Filtering actions - Excel style filtering #grid', () => {
             });
 
             const dates = fix.componentInstance.data.filter(d => d.ReleaseDate !== null && d.ReleaseDate !== undefined)
-                        .map(el => new Date(el.ReleaseDate)).sort((a, b) => a - b);
+                .map(el => new Date(el.ReleaseDate)).sort((a, b) => a - b);
             fix.detectChanges();
 
             // Open excel style custom filtering dialog and wait a bit.