class RuboCop::Cop::Style::NumericLiterals

def format_number(node)
  source = node.source.gsub(/\s+/, '')
  int_part, additional_part = source.split(DELIMITER_REGEXP, 2)
  formatted_int = format_int_part(int_part)
  delimiter = source[DELIMITER_REGEXP]
  if additional_part
    formatted_int + delimiter + additional_part
  else
    formatted_int
  end
end