fix: unicode

.Rbuildignore

@@ -13,3 +13,5 @@
 ^docs$
 ^scratch$
 ^revdep$
+^CRAN-SUBMISSION$
+^cran-comments\.md$

CRAN-SUBMISSION

@@ -0,0 +1,3 @@
+Version: 0.6.0
+Date: 2024-07-20 10:14:28 UTC
+SHA: c9fb8ace067afff77d0f920a35aa46668882a7f1

R/classif_mcc.R

@@ -25,8 +25,8 @@
 #' @details
 #' The above formula is undefined if any of the four sums in the denominator is 0 in the binary case and more generally if either \eqn{s^2 - sum(pk^2)} or \eqn{s^2 - sum(tk^2)} is equal to 0.
 #' The denominator is then set to 1.
-#' When there are more than two classes, the MCC will no longer range between −1 and +1.
-#' Instead, the minimum value will be between −1 and 0 depending on the true distribution. The maximum value is always +1.
+#' When there are more than two classes, the MCC will no longer range between -1 and +1.
+#' Instead, the minimum value will be between -1 and 0 depending on the true distribution. The maximum value is always +1.
 #'
 #' @references
 #' \url{https://en.wikipedia.org/wiki/Phi_coefficient}