Remove extra whitespaces/tabs before EOL.

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

Thanks to Ludovic.

examples/pn53x-diagnose.c

@@ -1,12 +1,12 @@
 /*-
  * Public platform independent Near Field Communication (NFC) library examples
- * 
+ *
  * 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.
@@ -22,12 +22,12 @@
  * 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 pn53x-diagnose.c
  * @brief Small application to diagnose PN53x using dedicated commands
  */
@@ -67,9 +67,9 @@ main (int argc, const char *argv[])
   if (argc > 1) {
     errx (1, "usage: %s", argv[0]);
   }
-  
+
   nfc_init (NULL);
-  
+
   // Display libnfc version
   acLibnfcVersion = nfc_version ();
   printf ("%s uses libnfc %s\n", argv[0], acLibnfcVersion);