### 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)

// 
				if (parts.size() >= 6) {
					line_new += starting_space + "# TODOConverter40 infinite_inertia were removed in Godot 4.0 - previous value `" + parts[5] + "`\n";
				}
				line_new += starting_space + base_obj + "move_and_slide()";
				if (!line.begins_with(starting_space + "move_and_slide")) {
					line = line_new + "\n" + line.substr(0, start) + "velocity" + line.substr(end + start);
				} else {
					line = line_new + line.substr(end + start);
				}
			}
		}
	}
	// 
	if (contains_function_call(line, "move_and_slide_with_(")) {
		int start = line.find("move_and_slide_with_(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			String base_obj = get_object_of_execution(line.substr(0, start));
			String starting_space = get_starting_space(line);
			Vector<String> parts = parse_arguments(line.substr(start, end));
			if (parts.size() >= 1) {
				String line_new;
				// 
				line_new += starting_space + base_obj + "set_velocity(" + parts[0] + ")\n";
				// 
				if (parts.size() >= 2) {
					line_new += starting_space + "# TODOConverter40 looks that  in Godot 4.0 is float, not vector like in Godot 3 - previous value `" + parts[1] + "`\n";
				}
				//