Nothing
test_that("str_crush removes all spaces from all parts of string", {
expect_equal(str_crush(" "), "")
expect_equal(str_crush("\n \t"), "")
expect_equal(str_crush("ab\t\tc\t"), "abc")
expect_equal(str_crush("\ta bc"), "abc")
expect_equal(str_crush("\ta\t bc\t"), "abc")
})
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