test(header): update header markup

src/components/modal/test/basic/main.html

@@ -1,10 +1,14 @@
 <ion-header>
+
   <ion-navbar>
     <ion-title>Modals</ion-title>
   </ion-navbar>
+
 </ion-header>
 
+
 <ion-content padding>
+
   <p>
     <button (click)="presentModal()">Present modal, pass params</button>
   </p>
@@ -26,4 +30,5 @@
   <p>
     {{platforms | json}}
   </p>
+
 </ion-content>