#' clean_col
#' Find possible duplicates
#' @name approx_dup
#' @param x A number.
#' @param y A number.
#' @export
#' @return The sum of \code{x} and \code{y}.
#' @examples
#' add(1, 1)
clean_col_categories <- function(d,col,dic = NULL, remove = TRUE){
}
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