### 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
if (completion_function == builtin_func_defs[idx].name) {
					if (builtin_func_defs[idx].tag != completion_class) {
						idx++;
						continue;
					}
					if (calltip.length()) {
						calltip += "\n";
					}
					calltip += get_datatype_name(builtin_func_defs[idx].rettype);
					calltip += " ";
					calltip += builtin_func_defs[idx].name;
					calltip += "(";
					bool found_arg = false;
					for (int i = 0; i < BuiltinFuncDef::MAX_ARGS - 1; i++) {
						if (builtin_func_defs[idx].args[i] == TYPE_VOID) {
							break;
						}
						if (i > 0) {
							calltip += ", ";
						} else {
							calltip += " ";
						}
						if (i == completion_argument) {
							calltip += char32_t(0xFFFF);
						}
						if (out_args.has(i)) {
							calltip += "out ";
						}
						calltip += get_datatype_name(builtin_func_defs[idx].args[i]);
						String arg_name = (String)builtin_func_defs[idx].args_names[i];