Added an r to the re.match string.

[MABERG13-github]

Issue

m = re.match("([0-9]+\.?[0-9]*)([a-z]+)", measure)

Raise SyntaxWarnings in python 3.12+.

Proposed solution

Make the string raw.

[MABERG13-github]

Hi @btel, I know that is bad practice to tag someone like this but it is a small change to the repo that shouldn't effect anything and as you said in #136 you do not actively maintain this repo so just though I would just take my shot and ping you.

Hope it is okej?

With best regards
Marcus