Clean up cli.py

[tlkamp]

No description provided.

[codecov-io]

Codecov Report

Merging #27 into master will decrease coverage by 0.07%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #27      +/-   ##
==========================================
- Coverage   94.15%   94.07%   -0.08%     
==========================================
  Files           7        7              
  Lines         154      152       -2     
==========================================
- Hits          145      143       -2     
  Misses          9        9

Impacted Files	Coverage Δ
ouroboros/cli.py	100% <100%> (ø)	⬆️
ouroboros/main.py	90.24% <100%> (-0.46%)	⬇️

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[circa10a]

NVM my regex comment, i overlooked that you didnt touch the function.

Thanks for the PR!