patch 8.2.4846: termcodes test fails

Problem:    Termcodes test fails.
Solution:   use CTRL-SHIFT-V to insert an unsimplified key. (closes #10316)
diff --git a/src/getchar.c b/src/getchar.c
index 6d8697c..2b1bbde 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1634,7 +1634,7 @@
 {
     int c = c_arg;
 
-    if ((*modifiers & MOD_MASK_CTRL) && !(*modifiers & MOD_MASK_SHIFT))
+    if (*modifiers & MOD_MASK_CTRL)
     {
 	if ((c >= '`' && c <= 0x7f) || (c >= '@' && c <= '_'))
 	{