Support chat template and `echo` for chat API #1765

	name: yapf

	on:
	# Trigger the workflow on push or pull request,
	# but only for the main branch
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	jobs:
	yapf:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.10"]
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install yapf==0.32.0
	pip install toml==0.10.2
	- name: Running yapf
	run: \|
	yapf --diff --recursive vllm tests

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