Change some terminals to rules in the grammar #814

	name: Code style compliance check

	on:
	push:
	branches:
	- develop
	- develop_*
	paths:
	- 'src/**'
	pull_request:
	branches:
	- develop
	- develop_*
	paths:
	- 'src/**'
	types:
	- opened
	- reopened
	- synchronize

	jobs:
	codestyle:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: '3.10'
	- name: Install Kestrel package
	run: \|
	python -m pip install --upgrade pip setuptools wheel
	python -m pip install black
	python -m pip install .
	- name: Code style check (please black your code)
	run: python -m black --check src/

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