CR is not removed with psql -f command on Windows.

Hi,

I am using Windows OS.
When creating a function with the psql -f filename command, the prosrc in pg_proc catalog contains \r(CR).
But I expect \r to be deleted. Is this a bug?
# If I use the psql < test.sql command, the prosrc in pg_proc catalog does not contain \r(CR).

[Environment]
* Windows 10
* PostgreSQL 13.3, compiled by Visual C + build 1914, 64 bit

[Reproduction]
(1) Create test.sql describing the following (The newline is CRLF)

CREATE OR REPLACE FUNCTION test_func(i integer) RETURNS integer AS $$
  BEGIN
    RETURN i + 1;
  END;
$$ LANGUAGE plpgsql;

(2) psql -f test.sql

(3) psql -c "SELECT proname, prosrc FROM pg_proc WHERE proname = 'test_func';"
The result of (3) above contains \r in the prosrc in pg_proc.

  proname  |       prosrc
-----------+---------------------
 test_func | \r                 +
           |   BEGIN\r          +
           |     RETURN i + 1;\r+
           |   END;\r           +

I found a similar bug report below.
Is it related to this problem?
* https://www.postgresql.org/message-id/flat/20201028204654.GD3239%40momjian.us#1b2a2672d66aa6f10225a24c320b434c

Regards,
Naoki, Okano