Format the code with a formatter

[Davoodeh]

Hello,

I was looking at this project again in my spare time and notices that the code is not "formatted." Since this is a matter of personal taste, I did not make a pull request not to touch everything in this project. But I highly recommend something like black with the default configurations or at least line-width = 79 be employed.

#49 makes this easier to configure and run cleanly since the toml files.

Thank you again