patch 8.2.2900: QuitPre is triggered before :wq writes the file

Problem:    QuitPre is triggered before :wq writes the file, which is
            different from other commands.
Solution:   Trigger QuitPre after writing the file. (closes #8279)
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 58dad65..9c8eba5 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -6089,7 +6089,7 @@
 }
 
 /*
- * ":exit", ":xit" and ":wq": Write file and quite the current window.
+ * ":exit", ":xit" and ":wq": Write file and quit the current window.
  */
     static void
 ex_exit(exarg_T *eap)
@@ -6112,17 +6112,17 @@
 	return;
     }
 
-    if (before_quit_autocmds(curwin, FALSE, eap->forceit))
-	return;
-
     /*
-     * if more files or windows we won't exit
+     * we plan to exit if there is only one relevant window
      */
     if (check_more(FALSE, eap->forceit) == OK && only_one_window())
 	exiting = TRUE;
-    if (       ((eap->cmdidx == CMD_wq
-		    || curbufIsChanged())
-		&& do_write(eap) == FAIL)
+
+    // Write the buffer for ":wq" or when it was changed.
+    // Trigger QuitPre and ExitPre.
+    // Check if we can exit now, after autocommands have changed things.
+    if (((eap->cmdidx == CMD_wq || curbufIsChanged()) && do_write(eap) == FAIL)
+	    || before_quit_autocmds(curwin, FALSE, eap->forceit)
 	    || check_more(TRUE, eap->forceit) == FAIL
 	    || (only_one_window() && check_changed_any(eap->forceit, FALSE)))
     {