Rainer Weikusat wrote:
> People who may not know it yet but who are (like me) prone to inverting
> two letter command names every once in a while might want to have a
> look
> at the sl package/ program.

https://github.com/nvbn/thefuck (package exists in the repos)
https://twitter.com/liamosaur/status/506975850596536320

Please pardon their French.