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src/site/_includes/language-tour/generics/index.markdown

 If you look at the API documentation for the basic array type,
 [List](http://api.dartlang.org/dart_core/List.html),
 you'll see that the type is actually **List\<E>**.
 The \<...> notation marks List as a _generic_
 (or _parameterized_) type&mdash;a
 type that can declare formal type parameters.
 
 
 ### Why use generics?
 
@@ skipping 76 matching lines @@
 For example:
 
 {% highlight dart %}
 var names = <String>['Seth', 'Kathy', 'Lars'];
 var pages = <String>{        // Specify value type: String
     'index.html':'Homepage', // (the key type is implicitly String).
     'robots.txt':'Hints for web robots',
     'humans.txt':'We are people, not machines' };
 {% endhighlight %}
 
-<aside class="note" markdown="1">
-  **Note:**
-  Map literals always have string _keys_.
-  The type before the brace specifies the type of the map's _values_.
+<aside>
+  <div class="alert alert-info">
+    <strong>Tip:</strong>
+    Map literals always have string _keys_.
+    The type before the brace specifies the type of the map's _values_.
+  </div>
 </aside>
 
 </section>
 
 
 <section id="generics-constructors" markdown="1">
 ### Using constructors
 
 To specify one or more types when using a constructor,
 put the types in angle brackets
@@ skipping 32 matching lines @@
 
 However, the **is** expression
 checks the type of the _collection_ only&mdash;not
 of the objects inside it.
 In production mode,
 a `List<String>` might have some non-string items in it.
 The solution is to either
 check each item's type or
 wrap item-manipulation code in an [exception handler](#exceptions).
 
-<aside class="note" markdown="1">
-  **Note:**
-  In contrast,
-  generics in Java use _erasure_,
-  which means that generic type parameters are removed at runtime.
-  In Java, you can test whether an object is a List,
-  but you can't test whether it's a List&lt;String>.
+<aside>
+  <div class="alert alert-info">
+    <strong>Note:</strong>
+    In contrast,
+    generics in Java use _erasure_,
+    which means that generic type parameters are removed at runtime.
+    In Java, you can test whether an object is a List,
+    but you can't test whether it's a <code>List&lt;String&gt;</code>.
+  </div>
 </aside>
 </section>
 
-
 <section id="generics-summary" markdown="1">
 ### Summary of generics
 
 For more information about generics, see
 [Optional Types in Dart](http://www.dartlang.org/articles/optional-types/).
 </section>