import-example: prefer single quotes

Let's prefer single quotes to double quotes throughout our template file.

Author: geneukum

app/components/import-example.hbs

@@ -1,21 +1,21 @@
-<div class="highlight javascript">
-  <div class="ribbon"></div>
+<div class='highlight javascript'>
+  <div class='ribbon'></div>
   {{#if (is-clipboard-supported)}}
-    <div class="import-copy">
+    <div class='import-copy'>
       {{#if this.showClipboardSuccessIcon}}
-        {{svg-jar "success" width="24px" height="24px"}}
+        {{svg-jar 'success' width='24px' height='24px'}}
       {{else}}
-        <CopyButton @clipboardText={{concat "import " @item " from '" @package "';"}} @title="Copy to clipboard" @success={{this.showSuccess}}>
-          {{svg-jar "copy" width="24px" height="24px"}}
+        <CopyButton @clipboardText={{concat 'import ' @item " from '" @package "';"}} @title='Copy to clipboard' @success={{this.showSuccess}}>
+          {{svg-jar 'copy' width='24px' height='24px'}}
         </CopyButton>
       {{/if}}
     </div>
   {{/if}}
-  <table class="CodeRay">
+  <table class='CodeRay'>
     <tbody>
       <tr>
-        <td class="code"><pre><span class="wrapper"><span class="keyword">import</span> {{@item}} <span class="keyword">from</span> <span class="string">'{{@package}}'</span>;</span></pre></td>
+        <td class='code'><pre><span class='wrapper'><span class='keyword'>import</span> {{@item}} <span class='keyword'>from</span> <span class='string'>'{{@package}}'</span>;</span></pre></td>
       </tr>
     </tbody>
   </table>
-</div>
+</div>