New TOC for dart-by-example page

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

Index: src/site/articles/numeric-computation/index.markdown
diff --git a/src/site/articles/numeric-computation/index.markdown b/src/site/articles/numeric-computation/index.markdown
index 3d6bfebc69754b2d7dcedc18a56331c48e6f3b13..014355be0efb208ba0d361e82ac12eb120c5badf 100644
--- a/src/site/articles/numeric-computation/index.markdown
+++ b/src/site/articles/numeric-computation/index.markdown
@@ -71,7 +71,7 @@ as numbers grow and shrink in range.
     <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>
@@ -79,7 +79,7 @@ as numbers grow and shrink in range.
     <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>
@@ -583,4 +583,4 @@ 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.