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

Source/wtf/dtoa.h

 /*
  *  Copyright (C) 2003, 2008, 2012 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 51 matching lines @@
 inline double parseDouble(const UChar* string, size_t length, size_t& parsedLength)
 {
     const size_t conversionBufferSize = 64;
     if (length > conversionBufferSize)
         return Internal::parseDoubleFromLongString(string, length, parsedLength);
     LChar conversionBuffer[conversionBufferSize];
     for (int i = 0; i < static_cast<int>(length); ++i)
         conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0;
     return parseDouble(conversionBuffer, length, parsedLength);
 }
-    
+
 } // namespace WTF
 
 using WTF::NumberToStringBuffer;
 using WTF::NumberToLStringBuffer;
 using WTF::numberToString;
 using WTF::numberToFixedPrecisionString;
 using WTF::numberToFixedWidthString;
 using WTF::parseDouble;
 
 #endif // WTF_dtoa_h