sd -- a drop-in replacement for `cd'

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| |_) || |     | || |_ | (_) |  __) || |__  | |_) || (_) |
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| |_) || |____    | |  | (_) | ___) | ___) || |_) || (_) |
|____/  \_____|   |_|   \___/ |____/ |____/ |____/  \___/