update README.md

Author: mrudangit

README.md

@@ -13,13 +13,16 @@ based on some key
 
 `const sub = new SnapShotReplaySubject<any>((value) => {return value.key});`
 
-`sub.next({key:'IBM', bid:100, ask:101}); 
-sub.next({key:'IBM', bid:102, ask:104});
-sub.subscribe((val) => {
+`sub.next({key:'IBM', bid:100, ask:101});`
+
+`sub.next({key:'IBM', bid:102, ask:104});`
+
+`sub.subscribe((val) => {
      console.log(value);
     } );
   }
 `
+
 will display only
 
 `{key:'IBM', bid:102, ask:104}`