Nothing
library(datamart)
test_strtail <- function() {
print(strtail(""))
print(strtail("", -10))
print(strtail("abc"))
print(strtail("abc",-1))
print(strtail("abc",-2))
print(strtail("abc",-3))
print(strtail("abc",-4))
print(strtail("abc",1))
print(strtail("abc",2))
print(strtail("abc",3))
print(strtail("abc",4))
}
test_strtail()
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