 todos into a Handlebars {{link-to}} helper: 

{{! ... additional lines...">

<meta name="referrer" content="unsafe-url">

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  <meta property="og:title" content="Transitioning to Show Only Complete Todos - Getting Started - Ember Guides">

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  <meta property="og:description" content="Next we'll update the application so a user can navigate to a url where only todos that have already been completed are displayed. 

In index.html convert the <a> tag for 'Completed' todos in