fix small edgecases

[Intron7]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 89.08%. Comparing base (6409028) to head (d2bd1fd).

Files with missing lines	Patch %	Lines
src/rapids_singlecell/tools/_draw_graph.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #789      +/-   ##
==========================================
- Coverage   89.08%   89.08%   -0.01%     
==========================================
  Files         112      112              
  Lines       11126    11128       +2     
==========================================
+ Hits         9912     9913       +1     
- Misses       1214     1215       +1     

Files with missing lines	Coverage Δ
...ids_singlecell/preprocessing/_scrublet/__init__.py	96.96% <100.00%> (ø)
src/rapids_singlecell/squidpy_gpu/_ligrec.py	83.47% <100.00%> (-0.07%)	⬇️
...ds_singlecell/tools/_rank_genes_groups/__init__.py	96.55% <100.00%> (+0.04%)	⬆️
src/rapids_singlecell/tools/_draw_graph.py	97.77% <66.66%> (-2.23%)	⬇️