title: right-to-left (RTL) in flutter
body: <p>I was using Flutter more than a week, and wanted to create an Arabic (right-to-left) app.</p>
  
  <p>I was reading <a href="https://flutter.io/tutorials/internationalization/" rel="noreferrer">Internationalizing Flutter Apps</a>, but it didn't mention how to set the layout direction.</p>
  
  <p>So, how to show right-to-left (RTL) layout in Flutter?</p>