Sorry for the confusion about the "no output," Simon. I should have explained more.
Yes, there was an error message when I removed the parentheses, so I immediately added an extra line, as in:
2022-12-31 ACME
a 1
b
Then I ran the following command, which resulted in no output:
hledger bal -N --pivot payee
So, I don't understand why the pivot command works with a posting that doesn't need balancing versus with a balanced transaction. I am sure there is a reason, but I just am not seeing it. (More opportunity to improve my hledger knowledge!)
Also, regarding the documentation, I will have some suggested minor tweaks. However, I will need to wait to hear about the above so that I can make sure that I have a good grasp of things before I offer possible changes.
Rob