Better flag masks repr

[dcherian]

[codecov]

Codecov Report

Merging #454 (96282c7) into main (15eeb44) will increase coverage by 0.06%.
The diff coverage is 77.50%.

@@            Coverage Diff             @@
##             main     #454      +/-   ##
==========================================
+ Coverage   86.25%   86.32%   +0.06%     
==========================================
  Files          22       22              
  Lines        4148     4176      +28     
  Branches      214      214              
==========================================
+ Hits         3578     3605      +27     
- Misses        512      513       +1     
  Partials       58       58              

Flag	Coverage Δ
mypy	37.45% <2.50%> (-0.24%)	⬇️
unittests	95.96% <93.93%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cf_xarray/formatting.py	77.14% <77.50%> (+2.96%)	⬆️