fix: make command line aliases work again

[mariobuikhuizen]

This was broken by an unintentionally removed line in 0d11ffc.

Fixes #550

[welcome]

Thanks for submitting your first pull request! You are awesome! 🤗

If you haven't done so already, check out Jupyter's Code of Conduct. Also, please make sure you followed the pull request template, as this will help us review your contribution more quickly.

You can meet the other Jovyans by joining our Discourse forum. There is also a intro thread there where you can stop by and say Hi! 👋

Welcome to the Jupyter community! 🎉

[codecov-commenter]

Codecov Report

Merging #564 (062ed6b) into master (52e9467) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #564      +/-   ##
==========================================
+ Coverage   76.93%   76.97%   +0.04%     
==========================================
  Files         109      109              
  Lines        9948     9949       +1     
  Branches     1078     1078              
==========================================
+ Hits         7653     7658       +5     
+ Misses       1913     1910       -3     
+ Partials      382      381       -1     

Impacted Files	Coverage Δ
jupyter_server/extension/application.py	71.90% <100.00%> (+0.13%)	⬆️
jupyter_server/services/kernels/kernelmanager.py	80.14% <0.00%> (-0.73%)	⬇️
jupyter_server/services/kernels/handlers.py	62.96% <0.00%> (+1.58%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 52e9467...062ed6b. Read the comment docs.

[Zsailer]

Thanks, @mariobuikhuizen!

[welcome]

Congrats on your first merged pull request in this project! 🎉

Thank you for contributing, we are very proud of you! ❤️