fix small regressions for edgecases

[Intron7]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.14%. Comparing base (16536b7) to head (3995494).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #794      +/-   ##
==========================================
+ Coverage   89.03%   89.14%   +0.10%     
==========================================
  Files         112      112              
  Lines       11149    11182      +33     
==========================================
+ Hits         9927     9968      +41     
+ Misses       1222     1214       -8     

Files with missing lines	Coverage Δ
src/rapids_singlecell/pertpy_gpu/_base.py	91.66% <100.00%> (+0.75%)	⬆️
...pids_singlecell/preprocessing/_harmony/__init__.py	93.67% <100.00%> (+1.97%)	⬆️
...ds_singlecell/preprocessing/_neighbors/__init__.py	90.29% <100.00%> (ø)
..._singlecell/preprocessing/_neighbors/_neighbors.py	98.91% <100.00%> (+0.26%)	⬆️
src/rapids_singlecell/squidpy_gpu/_niche.py	90.68% <100.00%> (+0.06%)	⬆️

... and 1 file with indirect coverage changes