A wrapper around base::paste()
that conditionally collapses a
character vector. If the vector length is greater than one, it is collapsed
using the supplied separator. Used internally to create legible error
messages.
chars_collapse(x, collapse = ", ")
A character string of length one if x
has length > 1, otherwise the
original vector unchanged.
A character vector.
A separator string used if x
has more than one element.