Sort in C locale

Fixes #1077

NEWS.md

@@ -1,5 +1,8 @@
 # roxygen2 (development version)
 
+* R6 methods and re-exported functions are always sorted in the C locale;
+  this ensures they're always sorted the same way in every environment (#1077).
+
 * When processing cross package markdown links (e.g. `[pkg::fun()]`),
   roxygen2 now looks up the file it needs to link to, instead of linking to
   the topic, to avoid "Non-file package-anchored links" `R CMD check` warnings.

R/object-import.R

@@ -19,7 +19,7 @@ merge.rd_section_reexport <- function(x, y, ...) {
 format.rd_section_reexport <- function(x, ...) {
   pkgs <- split(x$value$fun, x$value$pkg)
   pkg_links <- map2(names(pkgs), pkgs, function(pkg, funs) {
-    funs <- sort(funs)
+    funs <- sort_c(funs)
     files <- map_chr(
       funs,
       try_find_topic_in_package,

R/object-r6.R

@@ -150,7 +150,7 @@ extract_r6_super_data <- function(x) {
     c("method", "field", "active"),
     c(length(method_nms), length(field_nms), length(active_nms))
   )
-  rsort <- function(x) sort(x, decreasing = TRUE)
+  rsort <- function(x) sort_c(x, decreasing = TRUE)
   names <-c(rsort(method_nms), rsort(field_nms), rsort(active_nms))
   mth <- rbind(
     data.frame(

R/util-locale.R

@@ -11,4 +11,4 @@ with_collate <- function(locale, code) {
   force(code)
 }
 
-sort_c <- function(x) with_collate("C", sort(x))
+sort_c <- function(x, ...) with_collate("C", sort(x, ...))