New TOC for dart-by-example page

src/site/articles/numeric-computation/index.markdown

 ---
 layout: article
 title: "Numeric Computation"
 rel:
   author: john-mccutchan
 description: "How you store and use numbers can have a big impact on your app's performance. This article focuses on the Dart VM, with additional tips for apps that are compiled to JavaScript."
 has-permalinks: true
 article:
   written_on: 2013-05-22
   collection: performance
@@ skipping 53 matching lines @@
 as numbers grow and shrink in range.
 
 <table class="table table-bordered">
   <tr>
     <th> Internal representation </th>
     <td> smi (<b>sm</b>all <b>i</b>nteger) </td>
     <td> mint (<b>m</b>edium <b>int</b>eger) </td>
     <td> bigint </td>
   </tr>
   <tr>
-    <th> Minimum value </th> 
+    <th> Minimum value </th>
     <td> -2<sup>30</sup> (on a 32-bit machine)
          <br>
          -2<sup>62</sup> (on a 64-bit machine)</td>
     <td> -2<sup>63</sup> </td>
     <td> Limited by RAM </td>
   </tr>
   <tr>
-    <th> Maximum value </th> 
+    <th> Maximum value </th>
     <td> 2<sup>30</sup> - 1 (on a 32-bit machine)
          <br>
          2<sup>62</sup> - 1 (on a 64-bit machine)</td>
     <td> 2<sup>63</sup> - 1 </td>
     <td> Limited by RAM </td>
   </tr>
 </table>
 
 Here is an example of how a single integer value in the VM
 graduates from smi to mint to bigint:
@@ skipping 483 matching lines @@
 
 ### Typed lists
 
 JavaScript offers typed arrays
 that are compatible with Dart’s typed lists.
 The mapping is trivial—for example,
 Float32List becomes a Float32Array.
 The one exception today is that dart2js does not support 64-bit integers
 and thus does not support Int64List or Uint64List.
 Dart code compiled via dart2js results in a runtime exception
-if either of those lists is used.
+if either of those lists is used.