psql \copy warning

I use the \copy command from psql to load data into postgres. I was
fiddling with setting up a database on a HEAD build, and I got the
following new warning

testy=# \copy episodes from 'episodes.data' with delimiter as '\t'
WARNING: nonstandard use of escape in a string literal
LINE 1: COPY episodes FROM STDIN USING DELIMITERS '\t'
^
HINT: Use the escape string syntax for escapes, e.g., E'\r\n'.

I figured that this is the new standards conforming strings feature, and I
guess I should get used to the new escape syntax. So I tried the hint

testy=# \copy episodes FROM 'episodes.data' with delimiter as E'\t'
\copy: parse error at "'\t'"

So is it just me, or is this decidedly non-helpful? I assume someone
missed this place for the new syntax tweaks?

--
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Keep as cool as you can.
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