Typo in PL/pgSQL trigger Example 43.4?

 The PL/pgSQL page on triggers ( https://www.postgresql.org/docs/16/plpgsql-trigger.html ) contains the following example (I'm excerpting only the essential parts here):

Example 43.4. A PL/pgSQL Trigger Function for Auditing 

    ...

    CREATE TABLE emp_audit(
        operation  char(1)   NOT NULL,
        stamp      timestamp NOT NULL,
        userid     text      NOT NULL,  -- <= COLUMN IN QUESTION
        empname    text      NOT NULL,
        salary     integer
      );

      CREATE OR REPLACE FUNCTION process_emp_audit() RETURNS TRIGGER AS $emp_audit$
        BEGIN
          --
          -- Create a row in emp_audit to reflect the operation performed on emp,
          -- making use of the special variable TG_OP to work out the operation.
          --
          IF (TG_OP = 'DELETE') THEN
            INSERT INTO emp_audit SELECT 'D', now(), user, OLD.*; -- <= ARGUMENT IN QUESTION
          -- similar code with same issue follows for the other TG_OPs...

The emp_audit table has a column named 'userid', which in actual usage (next-to-last line quoted) is populated by 'user' which seems undefined in the context.  Was that intended to be 'current_user', or am I missing something?