bd6939a4e2
The separate "cd" command before invoking psql made sense (or at least I thought so) when it was added in commit ed1939332. But 4e3a61635 removed the supporting text that explained when to use it, making it just confusing. So drop it. Also switch from four-dot to three-dot filler for the unsupplied part of the path, since at least one person has read the four-dot filler as a typo for "../..". And fix these/those inconsistency. Discussion: https://postgr.es/m/160837647714.673.5195186835607800484@wrigleys.postgresql.org