psql man page error?

On the psql man page there is an example of how to perform multiple line
psql script as part of the -c option description.

The example given is

echo "\x \\ select * from foo;" | psql

which gives

prompt> echo "\x \\ select * from foo;" | psql
Expanded display is on.
invalid command \

i.e. doesn't work on bash. With bash the command should be:

echo -e "\x \n select * from foo;" | psql

which gives

prompt> echo -e "\x \n select * from foo;" | psql
Expanded display is on.
ERROR: relation "foo" does not exist

Does this mean there are multiple forms of the echo command, or is this
example just wrong?

--
Simon Riggs
EnterpriseDB http://www.enterprisedb.com