patch 8.2.1809: mapping some keys with Ctrl does not work properly
Problem: Mapping some keys with Ctrl does not work properly.
Solution: For terminal, GTK and Motif handle "@", "^" and "_" codes.
diff --git a/src/proto/misc2.pro b/src/proto/misc2.pro
index d55fc31..fc57403 100644
--- a/src/proto/misc2.pro
+++ b/src/proto/misc2.pro
@@ -72,6 +72,7 @@
int trans_special(char_u **srcp, char_u *dst, int flags, int *did_simplify);
int special_to_buf(int key, int modifiers, int keycode, char_u *dst);
int find_special_key(char_u **srcp, int *modp, int flags, int *did_simplify);
+int may_adjust_key_for_ctrl(int modifiers, int key);
int may_remove_shift_modifier(int modifiers, int key);
int extract_modifiers(int key, int *modp, int simplify, int *did_simplify);
int find_special_key_in_table(int c);