class CodeRay::Duo

def initialize lang = nil, format = nil, options = {}

(see CodeRay.get_scanner_options).
The options are forwarded to scanner and encoder

CodeRay::Duo[{ :ruby => :statistic }, :do => :something].encode 'abc'
alternative syntax with options:

CodeRay::Duo[:ruby => :statistic].encode 'class << self; end'
alternative syntax without options:

CodeRay::Duo[:ruby, :html, :hint => :debug].highlight '????::??'
with options:

CodeRay::Duo[:ruby, :html].highlight 'bla 42'
simple:

Create a new Duo, holding a lang and a format to highlight code. 
def initialize lang = nil, format = nil, options = {}
  if format.nil? && lang.is_a?(Hash) && lang.size == 1
    @lang = lang.keys.first
    @format = lang[@lang]
  else
    @lang = lang
    @format = format
  end
  @options = options
end