New convenience function File::Utils::output_file_check()
New convenience function File::Utils::output_file_check()

This function simply throws an exception if the command does not have file overwrite permission from the user, and a file already exists at the provided path.

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3