fix: don't log keybind hints message for modifier key events

src/keybind/keybind.zig

@@ -769,8 +769,11 @@ const BindingSet = struct {
     fn terminate_sequence(self: *const @This(), abort_type: AbortType) anyerror!void {
         if (abort_type == .match_impossible) {
             switch (self.on_match_failure) {
-                .insert => try self.insert_bytes(globals.current_sequence_egc.items),
-                .ignore => {},
+                .insert => if (globals.current_sequence_egc.items.len > 0)
+                    try self.insert_bytes(globals.current_sequence_egc.items)
+                else
+                    log_keyhints_message(),
+                .ignore => log_keyhints_message(),
             }
             globals.current_sequence.clearRetainingCapacity();
             globals.current_sequence_egc.clearRetainingCapacity();
@@ -781,6 +784,19 @@ const BindingSet = struct {
         }
     }
 
+    fn log_keyhints_message() void {
+        for (globals.current_sequence.items) |item| switch (item.key) {
+            input.key.left_control, input.key.right_control => return,
+            input.key.left_alt, input.key.right_alt => return,
+            input.key.left_shift, input.key.right_shift => return,
+            else => {},
+        };
+
+        const logger = log.logger("keybind");
+        defer logger.deinit();
+        logger.print("C-? for key hints", .{});
+    }
+
     /// Retrieve bindings that will match a key event sequence
     pub fn get_matches_for_key_event_sequence(
         self: *const @This(),