Bring key+attempt formatting in line with Dalli #3
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If the server for the key isn't found in the ring on the first attempt (i.e. due to a server getting replaced/going offline) then the new hash key in all subsequent attempts won't be generated in the same way as in dalli. @Jonathan-Arias discovered this; see: https://github.com/petergoldstein/dalli/blob/b895ae1f99eafd542d34662c61ac627b344eed71/lib/dalli/ring.rb#L39
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If the server for the key isn't found in the ring on the first iteration, then the new hash key in all subsequent attempts won't be generated in the same way as in the Dalli library.
This PR fixes it.
In Dalli it's
{attempt}{key}, versus{key}:{attempt}(current, incompatible)See:
https://github.com/petergoldstein/dalli/blob/b895ae1f99eafd542d34662c61ac627b344eed71/lib/dalli/ring.rb#L39