Code
str_dup("a", 3, sep = 1)
Condition
Error in `str_dup()`:
! `sep` must be a single string or `NULL`, not the number 1.
Code
str_dup("a", 3, sep = c("-", ";"))
Condition
Error in `str_dup()`:
! `sep` must be a single string or `NULL`, not a character vector.
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