message: STRINGIFY: use __VA_ARGS__ to avoid C4003 and double quote hack
diff: #include "vcpkg_System.h"
  #include "metrics.h"
  -#define STRINGIFY(X) #X
  +#define STRINGIFY(...) #__VA_ARGS__
  #define MACRO_TO_STRING(X) STRINGIFY(X)
  -#define VCPKG_VERSION_AS_STRING MACRO_TO_STRING(VCPKG_VERSION)"" // Double quotes needed at the end to prevent blank token
  +#define VCPKG_VERSION_AS_STRING MACRO_TO_STRING(VCPKG_VERSION)
  namespace vcpkg::Commands::Version
  {
  @@ -15,12 +15,7 @@ namespace vcpkg::Commands::Version
  static const std::string s_version =
  #include "../VERSION.txt"
  -
  -#pragma warning( push )
  -#pragma warning( disable : 4003)
  - // VCPKG_VERSION can be defined but have no value, which yields C4003.
  + std::string(VCPKG_VERSION_AS_STRING)
  -#pragma warning( pop )
  #ifndef NDEBUG
  + std::string("-debug")
  #endif
  