### 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)

return code_editor->get_navigation_state();
}
void ScriptTextEditor::_convert_case(CodeTextEditor::CaseStyle p_case) {
	code_editor->convert_case(p_case);
}
void ScriptTextEditor::trim_trailing_whitespace() {
	code_editor->trim_trailing_whitespace();
}
void ScriptTextEditor::insert_final_newline() {
	code_editor->insert_final_newline();
}
void ScriptTextEditor::convert_indent() {
	code_editor->get_text_editor()->convert_indent();
}
void ScriptTextEditor::tag_saved_version() {
	code_editor->get_text_editor()->tag_saved_version();
}
void ScriptTextEditor::goto_line(int p_line, bool p_with_error) {
	code_editor->goto_line(p_line);
}
void ScriptTextEditor::goto_line_selection(int p_line, int p_begin, int p_end) {
	code_editor->goto_line_selection(p_line, p_begin, p_end);
}
void ScriptTextEditor::goto_line_centered(int p_line) {
	code_editor->goto_line_centered(p_line);
}
void ScriptTextEditor::set_executing_line(int p_line) {