### 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 (line >= 0) {
					continue;
				}
				
				bool found_inherited_function = false;
				Ref<Script> inherited_script = script->get_base_script();
				while (!inherited_script.is_null()) {
					if (inherited_script->has_method(method)) {
						found_inherited_function = true;
						break;
					}
					inherited_script = inherited_script->get_base_script();
				}
				if (!found_inherited_function) {
					missing_connections.push_back(connection);
				}
			}
		}
	}
	
	methods_found.clear();
	for (int i = 0; i < functions.size(); i++) {
		StringName name = StringName(functions[i].get_slice(":", 0));
		if (methods_found.has(name)) {
			continue;
		}
		String found_base_class;
		StringName base_class = script->get_instance_base_type();
		Ref<Script> inherited_script = script->get_base_script();
		while (!inherited_script.is_null()) {