Fix "unexpected token" offset for Infinity #184

Job	Run time
ruby-versions / Generate Ruby versions	3s
ubuntu-20.04 2.3	53s
ubuntu-20.04 2.4	55s
ubuntu-20.04 2.5	58s
ubuntu-20.04 2.6	1m 1s
ubuntu-20.04 2.7	57s
ubuntu-20.04 3.0	27s
ubuntu-20.04 3.1	22s
ubuntu-20.04 3.2	21s
ubuntu-20.04 head	22s
ubuntu-20.04 jruby	1m 13s
ubuntu-20.04 jruby-head	1m 10s
ubuntu-20.04 truffleruby	52s
ubuntu-20.04 truffleruby-head	35s
ubuntu-22.04 2.3	56s
ubuntu-22.04 2.4	48s
ubuntu-22.04 2.5	58s
ubuntu-22.04 2.6	1m 0s
ubuntu-22.04 2.7	59s
ubuntu-22.04 3.0	21s
ubuntu-22.04 3.1	23s
ubuntu-22.04 3.2	23s
ubuntu-22.04 head	21s
ubuntu-22.04 jruby	1m 14s
ubuntu-22.04 jruby-head	1m 6s
ubuntu-22.04 truffleruby	52s
ubuntu-22.04 truffleruby-head	35s
macos-11 2.3	2m 10s
macos-11 2.4	3m 9s
macos-11 2.5	3m 28s
macos-11 2.6	2m 11s
macos-11 2.7	2m 7s
macos-11 3.0	34s
macos-11 3.1	36s
macos-11 3.2	40s
macos-11 head	33s
macos-11 jruby	1m 14s
macos-11 jruby-head	1m 20s
macos-11 truffleruby	1m 30s
macos-11 truffleruby-head	1m 2s
macos-12 2.3	1m 55s
macos-12 2.4	2m 16s
macos-12 2.5	2m 40s
macos-12 2.6	2m 36s
macos-12 2.7	2m 40s
macos-12 3.0	44s
macos-12 3.1	29s
macos-12 3.2	34s
macos-12 head	39s
macos-12 jruby	2m 0s
macos-12 jruby-head	1m 6s
macos-12 truffleruby	1m 45s
macos-12 truffleruby-head	1m 33s
windows-latest 2.3	2m 15s
windows-latest 2.4	2m 45s
windows-latest 2.5	4m 10s
windows-latest 2.6	3m 6s
windows-latest 2.7	2m 34s
windows-latest 3.0	1m 7s
windows-latest 3.1	1m 19s
windows-latest 3.2	2m 21s
windows-latest head	1m 9s
windows-latest mswin	1m 43s
ubuntu-latest jruby-9.1	1m 14s
ubuntu-latest jruby-9.2	1m 23s
ubuntu-latest jruby-9.3	1m 5s
	1h 27m 47s

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