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

Source/wtf/dtoa/bignum-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_BIGNUM_DTOA_H_
 #define DOUBLE_CONVERSION_BIGNUM_DTOA_H_
 
 #include "utils.h"
 
 namespace WTF {
 
 namespace double_conversion {
-    
+
     enum BignumDtoaMode {
         // Return the shortest correct representation.
         // For example the output of 0.299999999999999988897 is (the less accurate but
         // correct) 0.3.
         BIGNUM_DTOA_SHORTEST,
         // Return a fixed number of digits after the decimal point.
         // For instance fixed(0.1, 4) becomes 0.1000
         // If the input number is big, the output will be big.
         BIGNUM_DTOA_FIXED,
         // Return a fixed number of digits, no matter what the exponent is.
         BIGNUM_DTOA_PRECISION
     };
-    
+
     // Converts the given double 'v' to ascii.
     // The result should be interpreted as buffer * 10^(point-length).
     // The buffer will be null-terminated.
     //
     // The input v must be > 0 and different from NaN, and Infinity.
     //
     // The output depends on the given mode:
     //  - SHORTEST: produce the least amount of digits for which the internal
     //   identity requirement is still satisfied. If the digits are printed
     //   (together with the correct exponent) then reading this number will give
@@ skipping 11 matching lines @@
     //   any other digit would not satisfy the internal identity requirement.
     //  - PRECISION: produces 'requested_digits' where the first digit is not '0'.
     //   Even though the length of produced digits usually equals
     //   'requested_digits', the function is allowed to return fewer digits, in
     //   which case the caller has to fill the missing digits with '0's.
     //   Halfway cases are again rounded up.
     // 'BignumDtoa' expects the given buffer to be big enough to hold all digits
     // and a terminating null-character.
     void BignumDtoa(double v, BignumDtoaMode mode, int requested_digits,
                     Vector<char> buffer, int* length, int* point);
-    
+
 }  // namespace double_conversion
 
 } // namespace WTF
 
 #endif  // DOUBLE_CONVERSION_BIGNUM_DTOA_H_