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

Source/wtf/dtoa.cpp

 /****************************************************************
  *
  * The author of this software is David M. Gay.
  *
  * Copyright (c) 1991, 2000, 2001 by Lucent Technologies.
  * Copyright (C) 2002, 2005, 2006, 2007, 2008, 2010, 2012 Apple Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose without fee is hereby granted, provided that this entire notice
  * is included in all copies of any software which is or includes a copy
@@ skipping 1274 matching lines @@
 }
 
 const char* numberToFixedWidthString(double d, unsigned decimalPlaces, NumberToStringBuffer buffer)
 {
     // Mimic String::format("%.[precision]f", ...), but use dtoas rounding facilities.
     // "f": Signed value having the form [ – ]dddd.dddd, where dddd is one or more decimal digits.
     // The number of digits before the decimal point depends on the magnitude of the number, and
     // the number of digits after the decimal point depends on the requested precision.
     // "precision": The precision value specifies the number of digits after the decimal point.
     // If a decimal point appears, at least one digit appears before it.
-    // The value is rounded to the appropriate number of digits.    
+    // The value is rounded to the appropriate number of digits.
     double_conversion::StringBuilder builder(buffer, NumberToStringBufferLength);
     const double_conversion::DoubleToStringConverter& converter = double_conversion::DoubleToStringConverter::EcmaScriptConverter();
     converter.ToFixed(d, decimalPlaces, &builder);
     return builder.Finalize();
 }
 
 namespace Internal {
 
 double parseDoubleFromLongString(const UChar* string, size_t length, size_t& parsedLength)
 {
     Vector<LChar> conversionBuffer(length);
     for (size_t i = 0; i < length; ++i)
         conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0;
     return parseDouble(conversionBuffer.data(), length, parsedLength);
 }
 
 } // namespace Internal
 
 } // namespace WTF