Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/wtf/dtoa/strtod.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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
@@ skipping 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef DOUBLE_CONVERSION_STRTOD_H_
 #define DOUBLE_CONVERSION_STRTOD_H_
 
 #include "utils.h"
 
 namespace WTF {
 
 namespace double_conversion {
-    
+
     // The buffer must only contain digits in the range [0-9]. It must not
     // contain a dot or a sign. It must not start with '0', and must not be empty.
     double Strtod(Vector<const char> buffer, int exponent);
-    
+
 }  // namespace double_conversion
 
 } // namespace WTF
 
 #endif  // DOUBLE_CONVERSION_STRTOD_H_