[asl97]

Fixes sublimelsp/LSP-rust-analyzer#218

Feel free to edit as require for style/lint.

I left the current = current.get(key) alone as I am not sure if changing that to current = current[key] would be considered as unrelated changes.

This keep the return None if the value is actually an None value instead of replacing with default as per previous function, pre-7981a13

[jwortmann]

Makes sense. I'd say the suggested current[key] change instead of current.get(key) would be preferred now.

[asl97]

Replaced current.get(key) with current[key] as recommend.

[jwortmann]

Thanks