### 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)

break;
				}
			}
			switch (expression_pattern) {
				case RGBA_PARAMETER: {
					color_args = line.substr(begin, end - begin);
					String stripped = color_args.replace(" ", "").replace("\t", "").replace("(", "").replace(")", "");
					PackedFloat64Array color = stripped.split_floats(",");
					if (color.size() > 2) {
						float alpha = color.size() > 3 ? color[3] : 1.0f;
						color_picker->set_pick_color(Color(color[0], color[1], color[2], alpha));
					}
				} break;
				case COLOR_NAME: {
					if (end < 0) {
						end = line.length();
					}
					color_args = line.substr(begin, end - begin);
					const String color_name = color_args.replace(" ", "").replace("\t", "").replace(".", "");
					const int color_index = Color::find_named_color(color_name);
					if (0 <= color_index) {
						const Color color_constant = Color::get_named_color(color_index);
						color_picker->set_pick_color(color_constant);
					} else {
						has_color = false;
					}
				} break;
				default:
					has_color = false;
					break;