PostgreSQL INSERT INTO syntax error when creating function

Question

I'm getting a syntax error but having issues identifying what exactly the issue is. I'm not sure if I'm misunderstanding things here -- but it looks like the INSERT INTO is breaking, but only when it's in the function.

I'm running the below through Hasura:

CREATE OR REPLACE FUNCTION custom_q_into_selected()  
    RETURNS trigger AS $BODY$ 
    BEGIN
    IF NEW.is_custom = true THEN 
        INSERT INTO selected_question(book_id,question_id) 
        VALUES(NEW.custom_for_book_id,NEW.id);
    END IF;
    RETURN NEW;
END;
$BODY$ LANGUAGE plpgsql;

Keep getting this error when I run this:

postgres-error: syntax error at or near "\"

Database logs:

CREATE OR REPLACE FUNCTION custom_q_into_selected() \r

RETURNS trigger AS $BODY$\r

BEGIN\r

IF NEW.is_custom THEN \r

    INSERT INTO selected_question(book_id,question_id) VALUES(NEW.custom_for_book_id,NEW.id);\r

END IF;\r

RETURN NEW;\r

END;\r

$BODY$ LANGUAGE plpgsql;\r

Any help is appreciated.