clearer grid vars docs language

docs/scaffolding.html

@@ -174,22 +174,22 @@
       <tr>
         <td><code>@gridColumns</code></td>
         <td>12</td>
-        <td>The number of columns within the grid</td>
+        <td>Number of columns</td>
       </tr>
       <tr>
         <td><code>@gridColumnWidth</code></td>
         <td>60px</td>
-        <td>The width of each column within the grid</td>
+        <td>Width of each column</td>
       </tr>
       <tr>
         <td><code>@gridGutterWidth</code></td>
         <td>20px</td>
-        <td>The negative space between each column</td>
+        <td>Negative space between columns</td>
       </tr>
       <tr>
         <td><code>@siteWidth</code></td>
         <td><em>Computed sum of all columns and gutters</em></td>
-        <td>We use some basic match to count the number of columns and gutters and set the width of the <code>.fixed-container()</code> mixin.</td>
+        <td>Counts number of columns and gutters to set width of the <code>.fixed-container()</code> mixin</td>
       </tr>
     </tbody>
   </table>