fix grid tooltips, tweaks

docs/assets/css/docs.css

@@ -655,7 +655,6 @@ form.well {
 /* Docs examples
 ------------------------- */
 .bs-docs-example {
-  overflow: auto;
   position: relative;
   margin: 15px 0;
   padding: 39px 19px 14px;

docs/assets/js/application.js

@@ -36,8 +36,8 @@
     }
 
     // add tipsies to grid for scaffolding
-    if ($('#grid-system').length) {
-      $('#grid-system').tooltip({
+    if ($('#gridSystem').length) {
+      $('#gridSystem').tooltip({
           selector: '.show-grid > div'
         , title: function () { return $(this).width() + 'px' }
       })