message: added better explanation of symmetric difference
diff: @@ -213,7 +213,7 @@ rel_set_diff <- rapi_rel_set_diff
  #' SET SYMDIFF on two DuckDB relation objects
  #' @param rel_a a DuckDB relation object
  #' @param rel_b a DuckDB relation object
  -#' @return a new `duckdb_relation` object resulting from the SYMDIFF
  +#' @return a new `duckdb_relation` object resulting from the symmetric difference of rel_a and rel_b
  #' @noRd
  #' @examples
  #' rel_a <- rel_from_df(con, mtcars)
  