added new function here::u_r

[beevabeeva]

Not sure if you will like this. But I really find it useful. Judging from the amount of questions I have seen about it all over the internets, others might find it useful too.

Please note; I have not added a test yet. It should be pretty straight forward to do when I get the chance. Just wanted some feedback from the devs first.

[aviator-app[bot]]

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