Change flake8 styling rule from W503 to W504. #730

	# This workflow finds which files were changed, prints them,
	# and runs `pre-commit` on those files.

	# Inspired by the sktime library:
	# https://github.com/alan-turing-institute/sktime/blob/main/.github/workflows/test.yml

	name: Code Quality PR

	on:
	pull_request:
	branches: [main, "release/*"]

	permissions: read-all

	jobs:
	code-quality:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0

	- name: Set up Python
	uses: actions/setup-python@e9aba2c848f5ebd159c070c61ea2c4e2b122355e # v2.3.4

	- name: Find modified files
	id: file_changes
	uses: trilom/file-changes-action@a6ca26c14274c33b15e6499323aac178af06ad4b # v1.2.4
	with:
	output: " "

	- name: List modified files
	run: echo '${{ steps.file_changes.outputs.files}}'

	- name: Run pre-commits
	uses: pre-commit/action@9b88afc9cd57fd75b655d5c71bd38146d07135fe # v2.0.3
	with:
	extra_args: --files ${{ steps.file_changes.outputs.files}}

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