Nothing
test_that('gh_delta works', {
expect_equal(gh_delta(0L), c(90.0, 180.0))
expect_equal(gh_delta(8L), c(8.58306884765625e-05, 0.000171661376953125))
# one at a time, for now...
expect_error(gh_delta(1:5), 'One precision at a time', fixed = TRUE)
})
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