Clean up excessive whitespace at the end of each line using the wspurify tool made by Laszlo Monda

Demos/Device/LowLevel/Keyboard/Keyboard.txt

@@ -3,7 +3,7 @@
  *  This file contains special DoxyGen information for the generation of the main page and other special
  *  documentation pages. It is not a project source file.
  */
- 
+
 /** \mainpage Keyboard Device Demo
  *
  *  \section SSec_Compat Demo Compatibility:
@@ -28,7 +28,7 @@
  *    <td><b>USB Class:</b></td>
  *    <td>Human Interface Device (HID)</td>
  *   </tr>
- *   <tr> 
+ *   <tr>
  *    <td><b>USB Subclass:</b></td>
  *    <td>N/A</td>
  *   </tr>
@@ -50,8 +50,8 @@
  *  for implementing a USB Keyboard using the basic USB HID drivers in all modern
  *  OSes (i.e. no special drivers required). It is boot protocol compatible, and thus
  *  works under compatible BIOS as if it was a native keyboard (e.g. PS/2).
- *  
- *  On start-up the system will automatically enumerate and function as a keyboard 
+ *
+ *  On start-up the system will automatically enumerate and function as a keyboard
  *  when the USB connection to a host is present. To use the keyboard example,
  *  manipulate the joystick to send the letters a, b, c, d and e. See the USB HID
  *  documentation for more information on sending keyboard event and key presses. Unlike
@@ -59,7 +59,7 @@
  *  inside the same report to the host.
  *
  *  \section SSec_Options Project Options
- *  
+ *
  *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
  *
  *  <table>
@@ -70,3 +70,4 @@
  *   </tr>
  *  </table>
  */
+