Fix Doxygen spelling

Author: gpsimenos

drivers/USBKeyboard.h

@@ -189,7 +189,7 @@ class USBKeyboard: public USBHID, public mbed::Stream {
     virtual void report_rx();
 
     /**
-    * Read status of lock keys. Useful to switch-on/off leds according to key pressed. Only the first three bits of the result is important:
+    * Read status of lock keys. Useful to switch-on/off LEDs according to key pressed. Only the first three bits of the result is important:
     *   - First bit: NUM_LOCK
     *   - Second bit: CAPS_LOCK
     *   - Third bit: SCROLL_LOCK

drivers/USBMSD.h

@@ -42,7 +42,7 @@
  *
  * Introduction
  *
- * USBMSD implements the MSD protocol. It permits to access a block device (flash, sdcard,...)
+ * USBMSD implements the MSD protocol. It permits to access a block device (flash, SD Card,...)
  * from a computer over USB.
  *
  * @code

drivers/USBMouseKeyboard.h

@@ -215,7 +215,7 @@ class USBMouseKeyboard: public USBHID, public mbed::Stream {
     bool media_control(MEDIA_KEY key);
 
     /**
-    * Read status of lock keys. Useful to switch-on/off leds according to key pressed. Only the first three bits of the result is important:
+    * Read status of lock keys. Useful to switch-on/off LEDs according to key pressed. Only the first three bits of the result is important:
     *   - First bit: NUM_LOCK
     *   - Second bit: CAPS_LOCK
     *   - Third bit: SCROLL_LOCK

drivers/internal/USBDevice.h

@@ -184,13 +184,13 @@ class USBDevice: public  USBPhyEvents {
     void endpoint_stall(usb_ep_t endpoint);
 
     /**
-    * Unstall an endpoint
+    * Un-stall an endpoint
     *
-    * Unstalling an endpoint resets data toggle back to DATA0.
+    * Un-stalling an endpoint resets data toggle back to DATA0.
     * Additionally, if there is an ongoing transfer on this endpoint
     * it will be aborted.
     *
-    * @param endpoint Endpoint to unstall
+    * @param endpoint Endpoint to un-stall
     * @note This endpoint must already have been setup with endpoint_add
     */
     void endpoint_unstall(usb_ep_t endpoint);

hal/usb/USBPhy.h

@@ -259,7 +259,7 @@ class USBPhy {
     virtual void endpoint_stall(usb_ep_t endpoint) = 0;
 
     /**
-     * Unstall the endpoint
+     * Un-stall the endpoint
      *
      * Clear the HALT feature on this endpoint so communication can
      * resume.

tools/test/travis-ci/doxy-spellchecker/ignore.en.pws

@@ -96,4 +96,5 @@ TCPSocket
 UDPSocket
 Socket
 unregister
-_doxy_
+deinit
+_doxy_