fix line number detection bug with empty lines #433

	# This is a basic workflow to help you get started with Actions

	name: Lint

	on:
	workflow_dispatch:
	push:
	paths:
	- '**'
	- '!**.md'
	- '!doc/**'
	- '!**.txt'
	- '!LICENSE'
	- 'test/**'
	branches: ['main', 'release-*']
	pull_request:

	jobs:
	flake8_py3:
	runs-on: ubuntu-latest
	steps:
	- name: Setup Python
	uses: actions/setup-python@v1
	with:
	python-version: '3.9'
	architecture: x64
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install flake8
	run: pip install flake8
	- name: Run flake8
	uses: suo/flake8-github-action@releases/v1
	with:
	checkName: 'flake8_py3' # NOTE: this needs to be the same as the job name
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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