Spell checked non-source documentation pages.

Demos/Device/Mouse/Mouse.txt

@@ -41,7 +41,7 @@
  *  boot protocol compatible, and thus works under compatible BIOS as if
  *  it was a native mouse (e.g. PS/2).
  *  
- *  On startup the system will automatically enumerate and function
+ *  On start-up the system will automatically enumerate and function
  *  as a mouse when the USB connection to a host is present. To use
  *  the mouse, move the joystick to move the pointer, and push the
  *  joystick inwards to simulate a left-button click. The HWB serves as
@@ -72,4 +72,4 @@
  *        the data endpoint is serviced via polling using the task scheduler.</td>
  *   </tr>
  *  </table>
- */
+ */