Fix Rubocop #649

Job	Run time
rubocop	12s
Unit test (ubuntu-22.04, 3.2)	3m 38s
Unit test (ubuntu-22.04, 3)	3m 38s
Unit test (ubuntu-22.04, 3.1)	3m 38s
Unit test (ubuntu-22.04, 3.3)	3m 39s
Unit test (ubuntu-22.04, jruby-9.4)	2m 48s
Unit test (ubuntu-22.04, 3.4)	3m 51s
Unit test (ubuntu-22.04, jruby-10.0)	2m 48s
Unit test (ubuntu-22.04, truffleruby)	5m 34s
Unit test (macos-latest, 3)	1m 50s
Unit test (macos-latest, 3.4)	2m 9s
Unit test (macos-latest, 3.3)	1m 46s
Unit test (macos-latest, jruby-10.0)	2m 45s
Unit test (macos-latest, 3.1)	1m 56s
Unit test (macos-latest, truffleruby)	2m 46s
Unit test (macos-latest, jruby-9.4)	2m 57s
Unit test (macos-latest, 3.2)	1m 42s
Unit test (windows-latest, 3.2)	3m 4s
Unit test (windows-latest, 3.1)	3m 18s
Unit test (windows-latest, 3)	3m 20s
Unit test (windows-latest, 3.3)	3m 15s
Unit test (windows-latest, 3.4)	3m 17s
finish	0s
	1h 3m 51s

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