### 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)

CodeEdit *text_edit = code_editor->get_text_editor();
	Node *base = get_tree()->get_edited_scene_root();
	if (base) {
		base = _find_node_for_script(base, base, script);
	}
	ScriptLanguage::LookupResult result;
	if (ScriptServer::is_global_class(p_symbol) || p_symbol.is_resource_file() || script->get_language()->lookup_code(code_editor->get_text_editor()->get_text_for_symbol_lookup(), p_symbol, script->get_path(), base, result) == OK || (ProjectSettings::get_singleton()->has_autoload(p_symbol) && ProjectSettings::get_singleton()->get_autoload(p_symbol).is_singleton)) {
		text_edit->set_symbol_lookup_word_as_valid(true);
	} else if (p_symbol.is_relative_path()) {
		String path = _get_absolute_path(p_symbol);
		if (FileAccess::exists(path)) {
			text_edit->set_symbol_lookup_word_as_valid(true);
		} else {
			text_edit->set_symbol_lookup_word_as_valid(false);
		}
	} else {
		text_edit->set_symbol_lookup_word_as_valid(false);
	}
}
String ScriptTextEditor::_get_absolute_path(const String &rel_path) {