### Godot version

4.0.2.stable

### System information

Ubuntu 22.10

### Issue description

This happens when converting a godot3 project to a godot4 project.
Godot3 source
```gdscript
extends Node2D

export(int) var integer := 2
export(Resource) var resource: Resource = null
```

Result
```gdscript
extends Node2D

@export var integer: int := 2
@export var resource: Resource: Resource = null
```

Expected result
```gdscript
extends Node2D

@export var integer := 2
@export var resource: Resource = null
```

If someone can point to where in the code this might be fixed maybe I can fix it myself, sounds like a good first issue.


### Steps to reproduce

Open the given project (or any project really) and convert it to a godot 4 project

### Minimal reproduction project

[Conversion Tool Typing Problem.zip](https://github.com/godotengine/godot/files/11185334/Conversion.Tool.Typing.Problem.zip)

}
		}
		current_line++;
	}
	return found_renames;
}
void ProjectConverter3To4::rename_input_map_scancode(Vector<SourceLine> &source_lines, const RegExContainer &reg_container) {
	// 
	const int old_spkey = (1 << 24);
	for (SourceLine &source_line : source_lines) {
		if (source_line.is_comment) {
			continue;
		}
		String &line = source_line.line;
		if (uint64_t(line.length()) <= maximum_line_length) {
			TypedArray<RegExMatch> reg_match = reg_container.input_map_keycode.search_all(line);
			for (int i = 0; i < reg_match.size(); ++i) {
				Ref<RegExMatch> match = reg_match[i];
				PackedStringArray strings = match->get_strings();
				int key = strings[3].to_int();
				if (key & old_spkey) {
					// 
					key = (key & ~old_spkey) | (int)Key::SPECIAL;
					line = line.replace(strings[0], String(",\"") + strings[1] + "scancode\":" + String::num_int64(key));
				}
			}
		}
	}
}
Vector<String> ProjectConverter3To4::check_for_rename_input_map_scancode(Vector<String> &lines, const RegExContainer &reg_container) {