test_that("punctuate", {
expect_identical(ps_punctuate(1), "1")
expect_identical(ps_punctuate(1:2), "1 or 2")
expect_identical(ps_punctuate(1:3), "1, 2 or 3")
expect_identical(ps_punctuate(1:3, "and"), "1, 2 and 3")
})
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