### 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)

te->grab_focus();
	}
	if (d.has("type") && (String(d["type"]) == "files" || String(d["type"]) == "files_and_dirs")) {
		te->remove_secondary_carets();
		Array files = d["files"];
		String text_to_drop;
		bool preload = Input::get_singleton()->is_key_pressed(Key::CTRL);
		for (int i = 0; i < files.size(); i++) {
			if (i > 0) {
				text_to_drop += ", ";
			}
			if (preload) {
				text_to_drop += "preload(" + _quote_drop_data(String(files[i])) + ")";
			} else {
				text_to_drop += _quote_drop_data(String(files[i]));
			}
		}
		te->set_caret_line(row);
		te->set_caret_column(col);
		te->insert_text_at_caret(text_to_drop);
		te->grab_focus();
	}
	if (d.has("type") && String(d["type"]) == "nodes") {
		te->remove_secondary_carets();
		Node *scene_root = get_tree()->get_edited_scene_root();
		if (!scene_root) {
			EditorNode::get_singleton()->show_warning(TTR("Can't drop nodes without an open scene."));
			return;
		}
		Node *sn = _find_script_node(scene_root, scene_root, script);