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

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  / /  |  ____| / _ \ /_ | / _ \  / _ \ |  ____||  __ \ 
 / /_  | |__   | (_) | | || | | || (_) || |__   | |  | |
| '_ \ |  __|   \__, | | || | | | > _ < |  __|  | |  | |
| (_) || |        / /  | || |_| || (_) || |____ | |__| |
 \___/ |_|       /_/   |_| \___/  \___/ |______||_____/