dump of functions does not handle backslashes correctly

If you create a function from psql like:

CREATE FUNCTION "plpgsql_call_handler" ( ) RETURNS opaque AS
'/usr/local/pgsql/lib/plpgsql.so' LANGUAGE 'C';
CREATE TRUSTED PROCEDURAL LANGUAGE 'plpgsql' HANDLER "plpgsql_call_handler"
LANCOMPILER 'PL/pgSQL';
CREATE FUNCTION "atestfun" ( ) RETURNS text AS 'DECLARE mtt TEXT; BEGIN mtt
:= ''This is a \\\\ test.''; RETURN mtt; END;' LANGUAGE 'plpgsql';


Then use pg_dump on it, you get:

CREATE FUNCTION "plpgsql_call_handler" ( ) RETURNS opaque AS
'/usr/local/pgsql/lib/plpgsql.so' LANGUAGE 'C';
CREATE TRUSTED PROCEDURAL LANGUAGE 'plpgsql' HANDLER "plpgsql_call_handler"
LANCOMPILER 'PL/pgSQL';
CREATE FUNCTION "atestfun" ( ) RETURNS text AS 'DECLARE mtt TEXT; BEGIN mtt
:= ''This is a \\ test.''; RETURN mtt; END;' LANGUAGE 'plpgsql';

In the function, the variable "mtt" loses half of the '\' characters.  When
you reload this dump, the embedded '\' is lost.  When you do a

SELECT atestfun();

The ouput should be:

     atestfun
------------------
 This is a  \ test.
(1 row)

But instead, it returns:

     atestfun
------------------
 This is a  test.
(1 row)


Is this a pg_dump bug or is there there some way to do this right?

--
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