### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
calltip += ")";
					r_call_hint = calltip;
					return OK;
				}
			}
			int idx = 0;
			String calltip;
			bool low_end = RenderingServer::get_singleton()->is_low_end();
			if (stages && stages->has(block_function)) {
				for (const KeyValue<StringName, StageFunctionInfo> &E : (*stages)[block_function].stage_functions) {
					if (completion_function == E.key) {
						calltip += get_datatype_name(E.value.return_type);
						calltip += " ";
						calltip += E.key;
						calltip += "(";
						for (int i = 0; i < E.value.arguments.size(); i++) {
							if (i > 0) {
								calltip += ", ";
							} else {
								calltip += " ";
							}
							if (i == completion_argument) {
								calltip += char32_t(0xFFFF);
							}
							calltip += get_datatype_name(E.value.arguments[i].type);
							calltip += " ";
							calltip += E.value.arguments[i].name;
							if (i == completion_argument) {
								calltip += char32_t(0xFFFF);
							}