Previously, we supported "hledger add [DESCRIPTION]". A DESCRIPTION just
pre-filled the description field and bypassed that prompt, after which
existing transactions with similar descriptions were offered as
defaults/reminders.
Now, we support "hledger add [ACCOUNTPATTERN]" instead. After the
description prompt, existing transactions with similar descriptions *and*
which match ACCOUNTPATTERN are offered as defaults. This can be helpful eg
with a multi-person ledger, to match only your own transactions.
We now do data filtering/massage as late as possible, not just once at
startup. This should work better for multiple commands, as with web or ui.
The basic benchmark seems at least as good as before thanks to laziness.
