yaml_initialize

# File lib/rubygems/specification.rb, line 2751
  def yaml_initialize(tag, vals) # :nodoc:
    vals.each do |ivar, val|
      case ivar
      when "date"
        # Force Date to go through the extra coerce logic in date=
        self.date = val.untaint
      else
        instance_variable_set "@#{ivar}", val.untaint
      end
    end

    @original_platform = @platform # for backwards compatibility
    self.platform = Gem::Platform.new @platform
  end