delete_pages() does not accept a single int

### Description of the bug

document.delete_pages() should accept a single int positional parameter - called "Format 3" in documentation. But calling it with a single int parameter triggers an exception when trying to covert it to  a tuple with tuple(r). 

### How to reproduce the bug

call e.g. delete_pages(-1)

### PyMuPDF version

1.25.4

### Operating system

Windows

### Python version

3.13