### 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)

text_to_drop += vformat("@onready var %s: %s = %s%s\n", variable_name, node->get_class_name(), is_unique ? "%" : "$", path);
				} else {
					text_to_drop += vformat("@onready var %s = %s%s\n", variable_name, is_unique ? "%" : "$", path);
				}
			}
		} else {
			for (int i = 0; i < nodes.size(); i++) {
				if (i > 0) {
					text_to_drop += ", ";
				}
				NodePath np = nodes[i];
				Node *node = get_node(np);
				if (!node) {
					continue;
				}
				bool is_unique = false;
				String path;
				if (node->is_unique_name_in_owner()) {
					path = node->get_name();
					is_unique = true;
				} else {
					path = sn->get_path_to(node);
				}
				for (const String &segment : path.split("/")) {
					if (!segment.is_valid_identifier()) {
						path = _quote_drop_data(path);
						break;
					}
				}
				text_to_drop += (is_unique ? "%" : "$") + path;