BUG #9840: Documentation bug on pg_locks

The following bug has been logged on the website:

Bug reference: 9840
Logged by: Alexey Bashtanov
Email address: bashtanov(at)imap(dot)cc
PostgreSQL version: 9.3.4
Operating system: -
Description:

Hello!
Documentation
http://www.postgresql.org/docs/current/static/view-pg-locks.html states that
"if you are using prepared transactions, the transaction column can be
joined to the transaction column of the pg_prepared_xacts view to get more
information on prepared transactions that hold locks."

However, there is no "transaction" column in pg_locks.

Neither transactionid nor virtualtransaction could be the mentioned column
as transactionid is "null if the target is not a transaction ID" and
virtualtransaction has different column data type.

Please could you clarify the docs.

Regards,
Alexey Bashtanov