remove space in deepseek template

[grimoire]

The generated prompts have space at the begin, but the space and the following word might be a single token. Add space after Assistant might lead to unexpected result.

[AllentDan]

How about this?

lmdeploy/lmdeploy/model.py

Lines 895 to 899 in 4df476f

	def get_prompt(self, prompt, sequence_start=True):
	return super().get_prompt(prompt, sequence_start)[:-1]
	def messages2prompt(self, messages, sequence_start=True):
	return super().messages2prompt(messages, sequence_start)[:-1]