Fix generated constants: f64::INFINITY & f64::NEG_ INFINITY #2180

Job	Run time
msrv	57s
docs	21s
minimal	11s
check-cfg	20s
quickchecking	12s
rustfmt-clippy	13s
test-book	12s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	2m 1s
test-expectations (ubuntu-latest)	48s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	1m 54s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	1m 48s
test-expectations (macos-12)	1m 20s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	2m 1s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	2m 45s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	2m 19s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	2m 16s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	2m 16s
test (ubuntu-latest, 16.0, 1, 0, 0, 0, 0)	2m 40s
test (ubuntu-latest, 16.0, 1, 0, 0, 1, 0)	2m 42s
test (ubuntu-latest, 16.0, 1, 0, 1, 0, 0)	2m 38s
test (ubuntu-latest, 16.0, 1, 0, 1, 1, 0)	2m 48s
test (ubuntu-latest, 16.0, 1, 1, 0, 0, 0)	3m 3s
test (ubuntu-latest, 16.0, 1, 1, 0, 1, 0)	3m 6s
test (ubuntu-latest, 16.0, 1, 1, 1, 0, 0)	2m 58s
test (ubuntu-latest, 16.0, 1, 1, 1, 1, 0)	3m 4s
test (ubuntu-latest, 16.0, 0, 0, 1)	1m 45s
test (macos-12, 9.0, 0, 0, 0)	1m 40s
success	1s
	48m 19s

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