* work around anndata bug 344
* fix accidental cut and paste error
* Use modified make_index_unique function
Temporarily copy code from https://github.com/theislab/anndata/pull/345
until the issue is resolved and released.
* Add notes and test for make_index_unique
* Lint fix
* Format python
Co-authored-by: Matt Weiden <538456+mweiden@users.noreply.github.com>
