class Pfm::Settings

def write_config

writes the @settings attribute to disk
def write_config
  config_string = '---'
  @settings.each do |key, setting|
    config_string += "\n#{key}: '#{setting.value}'"
  end
  config_string += "\n"
  File.open(config_file, 'w') { |file| file.write(config_string) }
end