There is a long-standing oddity in psql that running
psql -f foo.sql
returns error messages with file name and line number, like
psql:foo.sql:1: ERROR: syntax error at or near "foo"
but running
psql < foo.sql does not. I suggest we change the latter to print
psql:<stdin>:1: ERROR: syntax error at or near "foo"
Other examples for the use of the spelling "<stdin>" in this context
include gcc and slonik.
Error messages printed in interactive mode will not be affected, of
course.
Patch attached.
