build

Do not repeat conversions to string #1814

Job	Run time
ruby-versions / Generate Ruby versions	6s
build (2.6 / macos-latest)	1m 4s
build (2.6 / ubuntu-latest)	32s
build (2.7 / ubuntu-latest)	32s
build (2.7 / macos-latest)	51s
build (mingw / windows-latest)	1m 29s
build (3.0 / ubuntu-latest)	16s
build (3.3 / windows-latest)	1m 44s
build (truffleruby-head / macos-latest)	47s
build (3.1 / windows-latest)	2m 28s
build (3.3 / ubuntu-latest)	18s
build (3.0 / windows-latest)	1m 46s
build (head / macos-latest)	22s
build (3.1 / macos-latest)	21s
build (2.6 / windows-latest)	1m 58s
build (head / ubuntu-latest)	19s
build (3.2 / macos-latest)	22s
build (mswin / windows-2022)	1m 27s
build (3.4 / macos-latest)	20s
build (3.0 / macos-latest)	17s
build (3.3 / macos-latest)	20s
build (3.2 / windows-latest)	1m 17s
build (3.2 / ubuntu-latest)	27s
build (truffleruby-head / ubuntu-latest)	49s
build (3.4 / ubuntu-latest)	28s
build (3.4 / windows-latest)	1m 36s
build (2.7 / windows-latest)	2m 5s
build (3.1 / ubuntu-latest)	24s
	24m 45s

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