Use single quotes consistently.

docs-assets/js/application.js

@@ -18,13 +18,13 @@
     //
     // See Getting Started docs for more information
     if (navigator.userAgent.match(/IEMobile\/10\.0/)) {
-      var msViewportStyle = document.createElement("style");
+      var msViewportStyle = document.createElement('style');
       msViewportStyle.appendChild(
         document.createTextNode(
-          "@-ms-viewport{width:auto!important}"
+          '@-ms-viewport{width:auto!important}'
         )
       );
-      document.getElementsByTagName("head")[0].
+      document.getElementsByTagName('head')[0].
         appendChild(msViewportStyle);
     }
 
@@ -73,20 +73,20 @@
 
     // tooltip demo
     $('.tooltip-demo').tooltip({
-      selector: "[data-toggle=tooltip]",
-      container: "body"
+      selector: '[data-toggle=tooltip]',
+      container: 'body'
     })
 
     $('.tooltip-test').tooltip()
     $('.popover-test').popover()
 
     $('.bs-docs-navbar').tooltip({
-      selector: "a[data-toggle=tooltip]",
-      container: ".bs-docs-navbar .nav"
+      selector: 'a[data-toggle=tooltip]',
+      container: '.bs-docs-navbar .nav'
     })
 
     // popover demo
-    $("[data-toggle=popover]")
+    $('[data-toggle=popover]')
       .popover()
 
     // button state demo