### Godot version

v4.0.beta10.official [d0398f62f]

### System information

Windows 22H2, Compatibility, GeForce GTX 550 Ti

### Issue description

Multiple lines of error messages are copied without line breaks:
The script editor's error panel shows:
```
Line 6:Expected parameter name.
Line 6:Expected closing ")" after function parameters.
Line 6:Expected ":" after function declaration.
```
But selecting and copying them `ctrl c`, copies them without line breaks:
```
Line 6:Expected parameter name.Line 6:Expected closing ")" after function parameters.Line 6:Expected ":" after function declaration.
```


### Steps to reproduce

- start Godot
- open the attached project
- open the script `Node2D.gd`
The status bar shows an error message.
- click on the red circle with an x in it, and the number 3 to the right of the circle.
The script editor's error panel shows three messages:
>Line 6:Expected parameter name.
Line 6:Expected closing ")" after function parameters.
Line 6:Expected ":" after function declaration.

- select all three lines, and copy them `ctrl c`
- in the script editor, click on the empty line 12 to place the cursor there.
- paste `ctrl v`

### Expected
The copied lines should be pasted on three lines, as they appeared in the error panel.

### Observed
There are no line breaks, they appear on the same line:
```
Line 6:Expected parameter name.Line 6:Expected closing ")" after function parameters.Line 6:Expected ":" after function declaration.
```


### Minimal reproduction project

[issue, error messages copied without line breaks.zip](https://github.com/godotengine/godot/files/10361376/issue.error.messages.copied.without.line.breaks.zip)

if (type.is_empty()) {
		return;
	}
	
	String method = meta.get("method", "");
	if (method.is_empty()) {
		return;
	}
	if (type == "connection") {
		Node *base = get_tree()->get_edited_scene_root();
		if (!base) {
			return;
		}
		Vector<Node *> nodes = _find_all_node_for_script(base, base, script);
		connection_info_dialog->popup_connections(method, nodes);
	} else if (type == "inherits") {
		String base_class_raw = meta["base_class"];
		PackedStringArray base_class_split = base_class_raw.split(":", true, 1);
		if (base_class_split[0] == "script") {
			
			Ref<Script> base_script = ResourceLoader::load(base_class_split[1]);
			ERR_FAIL_COND(!base_script.is_valid());
			emit_signal(SNAME("go_to_method"), base_script, method);
		} else if (base_class_split[0] == "builtin") {
			
			emit_signal(SNAME("go_to_help"), "class_method:" + base_class_split[1] + ":" + method);
		}
	}
}
void ScriptTextEditor::_edit_option(int p_op) {