class Phlex::HTML

def __vanish__(*args)

Becuase the BlackHole does nothing with the output, this should be faster.
Like `capture` but the output is vanished into a BlackHole buffer. 
def __vanish__(*args)
	return unless block_given?
	original_buffer = @_target
	@_target = BlackHole
	yield(*args)
	nil
ensure
	@_target = original_buffer
end