Highlighting important info in typography helper (bringing it to same as other parts of page) (#1396)

docs/documentation/modifiers/typography-helpers.html

@@ -355,11 +355,11 @@ doc-subtab: typography-helpers
       </tr>
       <tr>
         <td><code>is-lowercase</code></td>
-        <td>Transforms all characters to <strong>lowercase</strong></td>
+        <td>Transforms <strong>all characters</strong> to <strong>lowercase</strong></td>
       </tr>
       <tr>
         <td><code>is-uppercase</code></td>
-        <td>Transforms all characters to <strong>uppercase</strong></td>
+        <td>Transforms <strong>all characters</strong> to <strong>uppercase</strong></td>
       </tr>
       </tbody>
     </table>