wikiedit 'function' object has no attribute 'split'

```
File "/Users/wf/Library/Python/3.12/lib/python/site-packages/wikibot3rd/wikipush.py", line 386, in getDiff
    newTextLines = newText.split("\n")
                   ^^^^^^^^^^^^^
AttributeError: 'function' object has no attribute 'split'
```

needs to be fixed