### 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)

code_editor->set_executing_line(p_line);
}
void ScriptTextEditor::clear_executing_line() {
	code_editor->clear_executing_line();
}
void ScriptTextEditor::ensure_focus() {
	code_editor->get_text_editor()->grab_focus();
}
String ScriptTextEditor::get_name() {
	String name;
	name = script->get_path().get_file();
	if (name.is_empty()) {
		
		name = TTR("[unsaved]");
	} else if (script->is_built_in()) {
		const String &script_name = script->get_name();
		if (!script_name.is_empty()) {
			
			
			name = vformat("%s (%s)", script_name, name.get_slice("::", 0));
		}
	}
	if (is_unsaved()) {
		name += "(*)";
	}
	return name;
}
Ref<Texture2D> ScriptTextEditor::get_theme_icon() {