`decoder_inputs` construction

[kuraga]

Am I correct, this code prepends the <BOS> symbol?

tacotron2/model.py

Lines 396 to 398 in 185cd24

	decoder_input = self.get_go_frame(memory).unsqueeze(0)
	decoder_inputs = self.parse_decoder_inputs(decoder_inputs)
	decoder_inputs = torch.cat((decoder_input, decoder_inputs), dim=0)