The help command looks up its argument as an Info node, by default. Normally for me the TOPIC argument is quite forgiving, ie

you can give it a prefix
case doesn't matter
if it can't find any match, it shows the top node.

But today instead of having homebrew-installed info 6.8 in PATH, I had macos big sur's default info 4.8 (from 2004). With this, you get ugly errors like:

$ hledger-1.24 help queries    # actual node title is QUERIES
info: Cannot find node `queries'.
hledger-1.24: callCommand: info -f /private/var/folders/r7/f9j9c2zd1k97v47cr84j_qvc0000gp/T/hledger-hledger35585-0.info -n 'queries' (exit 1): failed

This is a bad experience, perhaps we should warn about the info version or something.