Namespace all arguments for DEL.
Namespace all arguments for DEL.

Fixes alexmchale#2

supasate/try.redis,NoellyB76/try.redis,PradheepShrinivasan/try.redis,PradheepShrinivasan/try.redis,supasate/try.redis,supasate/try.redis,NoellyB76/try.redis,PradheepShrinivasan/try.redis,alexmchale/try.redis,alexmchale/try.redis,badboy/try.redis,NoellyB76/try.redis,badboy/try.redis,badboy/try.redis