The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/10/static/backup-dump.html
Description:
"The basic usage of this command is:
pg_dumpall > outfile
The resulting dump can be restored with psql:
psql -f infile postgres
(Actually, you can specify any existing database name to..."
Should this not read :
psql-f outfile postgres