#' Functions for commonly used unicode symbols.
#'
#' @author Stuart K. Grange
#'
#' @return Character vector.
#'
#' @export
symbol_degree <- function() "\u00b0"
#' @rdname symbol_degree
#' @export
symbol_mu_lower <- function() "\u00b5"
#' @rdname symbol_degree
#' @export
symbol_subscript_1 <- function() "\u2081"
#' @rdname symbol_degree
#' @export
symbol_subscript_2 <- function() "\u2082"
#' @rdname symbol_degree
#' @export
symbol_subscript_4 <- function() "\u2084"
#' @rdname symbol_degree
#' @export
symbol_subscript_10 <- function() stringr::str_c("\u2081", "\u2080")
#' @rdname symbol_degree
#' @export
symbol_subscript_x <- function() "\u2093"
#' @rdname symbol_degree
#' @export
symbol_subscript_2.5 <- function() stringr::str_c("\u2082", "\u2024", "\u2085")
#' @rdname symbol_degree
#' @export
symbol_subscript_3 <- function() "\u2083"
#' @rdname symbol_degree
#' @export
symbol_superscript_3 <- function() "\u00B3"
#' @rdname symbol_degree
#' @export
symbol_superscript_minus <- function() "\u207B"
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