patch 8.2.3888: the argument list may contain duplicates
Problem: The argument list may contain duplicates.
Solution: Add the :argdedeupe command. (Nir Lichtman, closes #6235)
diff --git a/src/proto/arglist.pro b/src/proto/arglist.pro
index d3ccf2d..aeb8399 100644
--- a/src/proto/arglist.pro
+++ b/src/proto/arglist.pro
@@ -18,6 +18,7 @@
void ex_argument(exarg_T *eap);
void do_argfile(exarg_T *eap, int argn);
void ex_next(exarg_T *eap);
+void ex_argdedupe(exarg_T *eap);
void ex_argedit(exarg_T *eap);
void ex_argadd(exarg_T *eap);
void ex_argdelete(exarg_T *eap);