Init a new OptionFloat with a help message, a default value and names.

Property definitions

opts $ OptionFloat :: defaultinit
	# Init a new OptionFloat with a `help` message, a `default` value and `names`.
	init(help: String, default: Float, names: String...) is old_style_init do
		super(help, default, names)
	end
lib/opts/opts.nit:253,2--256,4