patch 9.1.1349: CmdlineLeavePre may trigger twice

Problem:  CmdlineLeavePre may trigger twice
          (after v9.1.1329)
Solution: check that the key was typed, trigger it when it wasn't before
          (Girish Palya)

There are two problems:
- CmdlineLeavePre may be triggered twice when a cabbr is present.
- CmdlineLeavePre fails to trigger when exiting the command-line via
  <Backspace>.

Check if the Carriage Return (Enter) key was actually typed.
Trigger the event when the command-line is exited using Backspace and
other keys.

closes: #17214

Signed-off-by: Girish Palya <girishji@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/ex_getln.c

@@ -1620,6 +1620,7 @@ getcmdline_int(
     int		did_save_ccline = FALSE;
     int		cmdline_type;
     int		wild_type = 0;
+    int		event_cmdlineleavepre_triggered = FALSE;
 
     // one recursion level deeper
     ++depth;
@@ -1917,8 +1918,15 @@ getcmdline_int(
 	}
 
 	// Trigger CmdlineLeavePre autocommand
-	if (c == '\n' || c == '\r' || c == K_KENTER || c == ESC || c == Ctrl_C)
+	if (KeyTyped && (c == '\n' || c == '\r' || c == K_KENTER || c == ESC
+#ifdef UNIX
+		    || c == intr_char
+#endif
+		    || c == Ctrl_C))
+	{
 	    trigger_cmd_autocmd(cmdline_type, EVENT_CMDLINELEAVEPRE);
+	    event_cmdlineleavepre_triggered = TRUE;
+	}
 
 	// The wildmenu is cleared if the pressed key is not used for
 	// navigating the wild menu (i.e. the key is not 'wildchar' or
@@ -2608,6 +2616,10 @@ returncmd:
     if (some_key_typed)
 	need_wait_return = FALSE;
 
+    // Trigger CmdlineLeavePre autocommands if not already triggered.
+    if (!event_cmdlineleavepre_triggered)
+	trigger_cmd_autocmd(cmdline_type, EVENT_CMDLINELEAVEPRE);
+
     // Trigger CmdlineLeave autocommands.
     trigger_cmd_autocmd(cmdline_type, EVENT_CMDLINELEAVE);