Remove extra whitespaces/tabs before EOL.

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

Thanks to Ludovic.

examples/nfc-mfsetuid.c

@@ -1,13 +1,13 @@
 /*-
  * Public platform independent Near Field Communication (NFC) library examples
- * 
+ *
  * Copyright (C) 2009, Roel Verdult
  * Copyright (C) 2011, Adam Laurie
- * 
+ *
  * 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.
@@ -23,12 +23,12 @@
  * 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
  *
  */
 
-/** 
+/**
  * @file nfc-mfsetuid.c
  * @brief Set UID of special Mifare cards
  */
@@ -178,7 +178,7 @@ main (int argc, char *argv[])
   }
 
   nfc_init (NULL);
-  
+
   // Try to open the NFC reader
   pnd = nfc_open (NULL, NULL);
 
@@ -190,7 +190,7 @@ main (int argc, char *argv[])
   // Initialise NFC device as "initiator"
   if (nfc_initiator_init (pnd) < 0) {
     nfc_perror (pnd, "nfc_initiator_init");
-    exit (EXIT_FAILURE);    
+    exit (EXIT_FAILURE);
   }
 
   // Configure the CRC