### 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)

goto_menu = memnew(MenuButton);
	goto_menu->set_text(TTR("Go To"));
	goto_menu->set_switch_on_hover(true);
	goto_menu->set_shortcut_context(this);
	bookmarks_menu = memnew(PopupMenu);
	bookmarks_menu->set_name("Bookmarks");
	breakpoints_menu = memnew(PopupMenu);
	breakpoints_menu->set_name("Breakpoints");
	connection_info_dialog = memnew(ConnectionInfoDialog);
	SET_DRAG_FORWARDING_GCD(code_editor->get_text_editor(), ScriptTextEditor);
}
ScriptTextEditor::~ScriptTextEditor() {
	highlighters.clear();
	if (!editor_enabled) {
		memdelete(code_editor);
		memdelete(warnings_panel);
		memdelete(errors_panel);
		memdelete(context_menu);
		memdelete(color_panel);
		memdelete(edit_hb);
		memdelete(edit_menu);
		memdelete(highlighter_menu);
		memdelete(search_menu);
		memdelete(goto_menu);
		memdelete(bookmarks_menu);
		memdelete(breakpoints_menu);
		memdelete(connection_info_dialog);
	}
}
static ScriptEditorBase *create_editor(const Ref<Resource> &p_resource) {