Lexicographic order in CharacterVector differs from the result obtained in R. See example. Is this result the expected behaviour? Thank you! ``` #include <Rcpp.h> using namespace Rcpp ; // [[Rcpp::export]] CharacterVector sortcpp(CharacterVector x) { x.sort(); return x; } /*** R x <-c("B", "b", "c","A","a") sort(x) ## "a" "A" "b" "B" "c" sortcpp(x) ## "A" "B" "a" "b" "c" */ ```