Remove extra whitespaces/tabs before EOL.

find . -name '*.[ch]' | xargs perl -pi -e 's/\t+$//; s/ +$//'

Thanks to Ludovic.

examples/nfc-emulate-uid.c

@@ -1,13 +1,13 @@
 /*-
  * Public platform independent Near Field Communication (NFC) library examples
- * 
+ *
  * Copyright (C) 2009, Roel Verdult
  * Copyright (C) 2010, Romuald Conty
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *  1) Redistributions of source code must retain the above copyright notice,
- *  this list of conditions and the following disclaimer. 
+ *  this list of conditions and the following disclaimer.
  *  2 )Redistributions in binary form must reproduce the above copyright
  *  notice, this list of conditions and the following disclaimer in the
  *  documentation and/or other materials provided with the distribution.
@@ -23,7 +23,7 @@
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * Note that this license only applies on the examples, NFC library itself is under LGPL
  *
  */
@@ -31,7 +31,7 @@
 /**
  * @file nfc-emulate-uid.c
  * @brief Emulates a tag which which have a "really" custom UID
- * 
+ *
  * NFC devices are able to emulate passive tags but manufacturers restrict the
  * customization of UID. With PN53x, UID is only 4-byte long and the first
  * byte of emulated UID is hard-wired to 0x08 which is the standard way to say
@@ -127,7 +127,7 @@ main (int argc, char *argv[])
 #endif
 
   nfc_init (NULL);
-  
+
   // Try to open the NFC device
   pnd = nfc_open (NULL, NULL);