### 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 (p_line.get_type() == Variant::INT) {
		goto_line_centered(p_line.operator int64_t());
	} else if (p_line.get_type() == Variant::DICTIONARY) {
		Dictionary meta = p_line.operator Dictionary();
		const int line = meta["line"].operator int64_t() - 1;
		const String code = meta["code"].operator String();
		const String quote_style = EDITOR_GET("text_editor/completion/use_single_quotes") ? "'" : "\"";
		CodeEdit *text_editor = code_editor->get_text_editor();
		String prev_line = line > 0 ? text_editor->get_line(line - 1) : "";
		if (prev_line.contains("@warning_ignore")) {
			const int closing_bracket_idx = prev_line.find(")");
			const String text_to_insert = ", " + code.quote(quote_style);
			prev_line = prev_line.insert(closing_bracket_idx, text_to_insert);
			text_editor->set_line(line - 1, prev_line);
		} else {
			const int indent = text_editor->get_indent_level(line) / text_editor->get_indent_size();
			String annotation_indent;
			if (!text_editor->is_indent_using_spaces()) {
				annotation_indent = String("\t").repeat(indent);
			} else {
				annotation_indent = String(" ").repeat(text_editor->get_indent_size() * indent);
			}
			text_editor->insert_line_at(line, annotation_indent + "@warning_ignore(" + code.quote(quote_style) + ")");
		}
		_validate_script();
	}
}
void ScriptTextEditor::_error_clicked(Variant p_line) {