vim-patch:9.0.1516: cannot use special keys in <Cmd> mapping

Problem:    Cannot use special keys in <Cmd> mapping.
Solution:   Do allow for special keys in <Cmd> and <ScriptCmd> mappings.
            (closes vim/vim#12326)

https://github.com/vim/vim/commit/3ab3a864814f903da8a158c01820e4fbe1013c08

2 files changed, 16 insertions, 6 deletions

diff --git a/src/nvim/getchar.c b/src/nvim/getchar.c
index 07d7887fc6..c070e53089 100644
--- a/src/nvim/getchar.c
+++ b/src/nvim/getchar.c
@@ -554,6 +554,21 @@ void AppendToRedobuffLit(const char *str, int len)
   }
 }
 
+/// Append "s" to the redo buffer, leaving 3-byte special key codes unmodified
+/// and escaping other K_SPECIAL bytes.
+void AppendToRedobuffSpec(const char *s)
+{
+  while (*s != NUL) {
+    if ((uint8_t)(*s) == K_SPECIAL && s[1] != NUL && s[2] != NUL) {
+      // Insert special key literally.
+      add_buff(&redobuff, s, 3L);
+      s += 3;
+    } else {
+      add_char_buff(&redobuff, mb_cptr2char_adv(&s));
+    }
+  }
+}
+
 /// Append a character to the redo buffer.
 /// Translates special keys, NUL, K_SPECIAL and multibyte characters.
 void AppendCharToRedobuff(int c)
@@ -2927,11 +2942,6 @@ char *getcmdkeycmd(int promptc, void *cookie, int indent, bool do_concat)
       }
       c1 = TO_SPECIAL(c1, c2);
     }
-    if (c1 == Ctrl_V) {
-      // CTRL-V is followed by octal, hex or other characters, reverses
-      // what AppendToRedobuffLit() does.
-      c1 = get_literal(true);
-    }
 
     if (got_int) {
       aborted = true;
diff --git a/src/nvim/ops.c b/src/nvim/ops.c
index bb66bb5731..ef26d5900d 100644
--- a/src/nvim/ops.c
+++ b/src/nvim/ops.c
@@ -5858,7 +5858,7 @@ void do_pending_operator(cmdarg_T *cap, int old_col, bool gui_yank)
         if (repeat_cmdline == NULL) {
           ResetRedobuff();
         } else {
-          AppendToRedobuffLit(repeat_cmdline, -1);
+          AppendToRedobuffSpec(repeat_cmdline);
           AppendToRedobuff(NL_STR);
           XFREE_CLEAR(repeat_cmdline);
         }