new site

src/site/_includes/docs/getting-started/_class.html

Index: src/site/_includes/docs/getting-started/_class.html
diff --git a/src/site/_includes/docs/getting-started/_class.html b/src/site/_includes/docs/getting-started/_class.html
index f20b7a5e6f472f7c233f732d22ae44afd766c056..bc6a6d39e9f0dbffaf85da98690530602c37fe2f 100644
--- a/src/site/_includes/docs/getting-started/_class.html
+++ b/src/site/_includes/docs/getting-started/_class.html
@@ -212,15 +212,17 @@ class Greeter {
   greeter.greet('types');
 } </pre>
 
-    <aside class="note">
-      <strong>Note:</strong>
-      You might have expected to see a <code>public</code> keyword
-      in the preceding code,
-      but there's no such thing in Dart.
-      Every type in Dart is public unless its name
-      starts with an underscore ("_").
-      For example, <code>Greeter</code> is public,
-      but <code>_Greeter</code> would be private.
+    <aside>
+      <div class="alert alert-info">
+        <strong>Tip:</strong>
+        You might have expected to see a <code>public</code> keyword
+        in the preceding code,
+        but there's no such thing in Dart.
+        Every type in Dart is public unless its name
+        starts with an underscore ("_").
+        For example, <code>Greeter</code> is public,
+        but <code>_Greeter</code> would be private.
+      </div>
     </aside>
   </dd>
 </dl>