context("Polish sl")
test_that("Year polishing is correct", {
expect_true(is.na(remove_sl("s. l.")))
expect_true(is.na(remove_sl("s.n.")))
expect_true(is.na(remove_sl("s. a")))
expect_true(is.na(remove_sl("s i.")))
expect_true(is.na(remove_sl("n l")))
expect_true(is.na(remove_sl("sl.")))
expect_true(is.na(remove_sl("[s. n.]")))
expect_true(is.na(remove_sl("[s.n.?]")))
})
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