Various minor code cleanups

[nicokoch]

• Fix wrong identation
• Make error handling more idiomatic

[conradkleinespel]

Hey @nicokoch ! Thanks for this 👍 and sorry for not replying earlier 😬

I'll have a look at this soon and merge.

[conradkleinespel]

Thanks @nicokoch ! I'll have a look at the last open PR this weekend and then merge/publish. Until then, you can use the git way of defining dependencies if needed:

[dependencies]
rpassword = { git = "https://github.com/conradkleinespel/rpassword", rev = "acff1bd" }