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

Source/wtf/dtoa/fixed-dtoa.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_FIXED_DTOA_H_
 #define DOUBLE_CONVERSION_FIXED_DTOA_H_
 
 #include "utils.h"
 
 namespace WTF {
 
 namespace double_conversion {
-    
+
     // Produces digits necessary to print a given number with
     // 'fractional_count' digits after the decimal point.
     // The buffer must be big enough to hold the result plus one terminating null
     // character.
     //
     // The produced digits might be too short in which case the caller has to fill
     // the gaps with '0's.
     // Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and
     // decimal_point = -2.
     // Halfway cases are rounded towards +/-Infinity (away from 0). The call
     // FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0.
     // The returned buffer may contain digits that would be truncated from the
     // shortest representation of the input.
     //
     // This method only works for some parameters. If it can't handle the input it
     // returns false. The output is null-terminated when the function succeeds.
     bool FastFixedDtoa(double v, int fractional_count,
                        Vector<char> buffer, int* length, int* decimal_point);
-    
+
 }  // namespace double_conversion
 
 } // namespace WTF
 
 #endif  // DOUBLE_CONVERSION_FIXED_DTOA_H_