old_contents: """Convert :term:`YAML` to :term:`JSON` format"""
  import yaml, json
  from biokit.converters.convbase import ConvBase
  
  __all__ = ["YAML2JSON"]
  
  
  class YAML2JSON(ConvBase):
      """Convert :term:`YAML` file into :term:`JSON` file
  
      Conversion is based on yaml and json standard Python modules
  
      .. note:: YAML comments will be lost in JSON output
  
  
      """
      def __init__(self, infile, outfile, *args, **kargs):
          """.. rubric:: constructor
  
          :param str infile: input YAML file. 
          :param str outfile: input JSON file
          """
          super(YAML2JSON, self).__init__(infile, outfile, *args, **kargs)
  
      def get_json(self):
          """Return the JSON dictionary corresponding to the YAML input"""
          data = yaml.load(open(self.infile, "r"))
          return json.dumps(data, sort_keys=True, indent=4)
  
      def convert(self):
          with open(self.outfile, "w") as outfile:
              outfile.write(self.get_json())
  
  
new_contents: """Convert :term:`YAML` to :term:`JSON` format"""
  import yaml, json
  from biokit.converters.convbase import ConvBase
  
  __all__ = ["YAML2JSON"]
  
  
  class YAML2JSON(ConvBase):
      """Convert :term:`YAML` file into :term:`JSON` file
  
      Conversion is based on yaml and json standard Python modules
  
      .. note:: YAML comments will be lost in JSON output
  
  
      :reference: http://yaml.org/spec/1.2/spec.html#id2759572
      """
      def __init__(self, infile, outfile, *args, **kargs):
          """.. rubric:: constructor
  
          :param str infile: input YAML file. 
          :param str outfile: input JSON file
          """
          super(YAML2JSON, self).__init__(infile, outfile, *args, **kargs)
  
      def get_json(self):
          """Return the JSON dictionary corresponding to the YAML input"""
          data = yaml.load(open(self.infile, "r"))
          return json.dumps(data, sort_keys=True, indent=4)
  
      def convert(self):
          with open(self.outfile, "w") as outfile:
              outfile.write(self.get_json())
  
  
subject: update doc