### 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)

errors_panel->set_h_size_flags(SIZE_EXPAND_FILL);
	errors_panel->set_meta_underline(true);
	errors_panel->set_selection_enabled(true);
	errors_panel->set_context_menu_enabled(true);
	errors_panel->set_focus_mode(FOCUS_CLICK);
	errors_panel->hide();
	update_settings();
	code_editor->get_text_editor()->set_code_hint_draw_below(EDITOR_GET("text_editor/completion/put_callhint_tooltip_below_current_line"));
	code_editor->get_text_editor()->set_symbol_lookup_on_click_enabled(true);
	code_editor->get_text_editor()->set_context_menu_enabled(false);
	context_menu = memnew(PopupMenu);
	color_panel = memnew(PopupPanel);
	edit_hb = memnew(HBoxContainer);
	edit_menu = memnew(MenuButton);
	edit_menu->set_text(TTR("Edit"));
	edit_menu->set_switch_on_hover(true);
	edit_menu->set_shortcut_context(this);
	highlighter_menu = memnew(PopupMenu);
	highlighter_menu->set_name("highlighter_menu");
	Ref<EditorPlainTextSyntaxHighlighter> plain_highlighter;
	plain_highlighter.instantiate();
	add_syntax_highlighter(plain_highlighter);
	Ref<EditorStandardSyntaxHighlighter> highlighter;
	highlighter.instantiate();
	add_syntax_highlighter(highlighter);
	set_syntax_highlighter(highlighter);
	search_menu = memnew(MenuButton);
	search_menu->set_text(TTR("Search"));
	search_menu->set_switch_on_hover(true);
	search_menu->set_shortcut_context(this);