improvement: use null coalescing operator #404

	name: "Code Linting"
	on:
	push:
	paths:
	- .php-cs-fixer.dist.php
	- autoload.php
	- lib/**
	- data/**
	- tests/**
	branches:
	- master
	pull_request:
	paths:
	- .php-cs-fixer.dist.php
	- autoload.php
	- lib/**
	- data/**
	- tests/**

	jobs:
	php-cs-fixer:
	name: 'PHP-CS-Fixer'
	runs-on: 'ubuntu-latest'
	steps:
	- uses: actions/checkout@v4

	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: 7.4
	tools: php-cs-fixer:3.52, cs2pr

	- uses: actions/cache@v4
	with:
	path: '.php-cs-fixer.cache'
	key: ${{ github.repository }}-7.4-phpcsfixer-${{ github.ref_name }}
	restore-keys: \|
	${{ github.repository }}-7.4-phpcsfixer-master
	${{ github.repository }}-7.4-phpcsfixer-

	- name: Run PHP-CS-Fixer
	# Using cs2pr settings, see: https://github.com/shivammathur/setup-php#tools-with-checkstyle-support
	run: 'php-cs-fixer fix --dry-run --format=checkstyle \| cs2pr'

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