Use a code formatter and pre-commit hooks about lsdensities

[edbennett]

@nickforce989 Can you look at this next, please? I think this shouldn't take you longer than an hour.

[nickforce989]

@edbennett, yes I will look into this as next issue.

[edbennett]

Before closing this, run pre-commit run --all and commit any fixes that it suggests.

[edbennett]

(Note that if you think a commit will fix an issue, you can use the literal text fixes #number or fix #number or closes #number in the commit message and it will happen automatically. I'd recommend only using this in a branch so that the changes can be reviewed a pull request before the issues gets automatically closed.)

[nickforce989]

Done!

[edbennett]

I'd recommend using 5–10 words to describe the issue being fixed rather than just referencing an issue number, for the benefit of those reading the git log in future who may not have the GitHub up.