class Asciidoctor::Logger

def add severity, message = nil, progname = nil 

def add severity, message = nil, progname = nil
  if (severity ||= UNKNOWN) > (@max_severity ||= severity)
    @max_severity = severity
  end
  super
end

def initialize *args 

def initialize *args
  super
  self.progname = 'asciidoctor'
  self.formatter = BasicFormatter.new
  self.level = WARN
end