* fix all violations of phpcs rule #191

Job	Run time
runs-on (macos-latest) / phan	1m 46s
runs-on (macos-latest) / phpcs	1m 54s
runs-on (macos-latest) / php-cs-fixer	1m 49s
runs-on (macos-latest) / phpmd	4m 19s
runs-on (macos-latest) / phpstan	1m 53s
runs-on (macos-latest) / phpunit-infection	2m 17s
runs-on (macos-latest) / pint	1m 28s
runs-on (macos-latest) / psalm	2m 34s
runs-on (ubuntu-latest) / phan	48s
runs-on (ubuntu-latest) / phpcs	21s
runs-on (ubuntu-latest) / php-cs-fixer	19s
runs-on (ubuntu-latest) / phpmd	21s
runs-on (ubuntu-latest) / phpstan	33s
runs-on (ubuntu-latest) / phpunit-infection	1m 11s
runs-on (ubuntu-latest) / pint	33s
runs-on (ubuntu-latest) / psalm	30s
runs-on (windows-latest) / phan	43s
runs-on (windows-latest) / phpcs	41s
runs-on (windows-latest) / php-cs-fixer	49s
runs-on (windows-latest) / phpmd	34s
runs-on (windows-latest) / phpstan	45s
runs-on (windows-latest) / phpunit-infection	38s
runs-on (windows-latest) / pint	44s
runs-on (windows-latest) / psalm	49s
	28m 19s

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