### 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)

case SEARCH_GOTO_LINE: {
			goto_line_dialog->popup_find_line(tx);
		} break;
		case BOOKMARK_TOGGLE: {
			code_editor->toggle_bookmark();
		} break;
		case BOOKMARK_GOTO_NEXT: {
			code_editor->goto_next_bookmark();
		} break;
		case BOOKMARK_GOTO_PREV: {
			code_editor->goto_prev_bookmark();
		} break;
		case BOOKMARK_REMOVE_ALL: {
			code_editor->remove_all_bookmarks();
		} break;
		case DEBUG_TOGGLE_BREAKPOINT: {
			Vector<int> caret_edit_order = tx->get_caret_index_edit_order();
			caret_edit_order.reverse();
			int last_line = -1;
			for (const int &c : caret_edit_order) {
				int from = tx->has_selection(c) ? tx->get_selection_from_line(c) : tx->get_caret_line(c);
				from += from == last_line ? 1 : 0;
				int to = tx->has_selection(c) ? tx->get_selection_to_line(c) : tx->get_caret_line(c);
				if (to < from) {
					continue;
				}
				
				bool selection_has_breakpoints = false;
				for (int line = from; line <= to; line++) {
					if (tx->is_line_breakpointed(line)) {