The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.5/explicit-locking.html
Description:
https://www.postgresql.org/docs/12/explicit-locking.html
In the block after this sentence: "This acquires a row-level lock on the row
with the specified account number. Then, the second transaction executes:"
The second update statement has the worng