message: fix(core): fix a linting error
diff: @@ -92,7 +92,7 @@ export class SidenavComponent implements OnInit {
  getUserDetails () {
  this.userService.whoAmI().subscribe((user: any) => {
  this.userEmail = user.email
  - this.sizeOfMail = (""+user.email).length
  + this.sizeOfMail = ('' + user.email).length
  }, (err) => console.log(err))
  }
  