[Trivial, RPC] Fix and cleanup listreceivedbyX documentation
[Trivial, RPC] Fix and cleanup listreceivedbyX documentation

Ref: https://github.com/bitcoin/bitcoin/pull/7527

caraka/gridcoinresearch,caraka/gridcoinresearch,caraka/gridcoinresearch,caraka/gridcoinresearch,caraka/gridcoinresearch,caraka/gridcoinresearch