This could cause error when reconciling transaction that are included.
Some message should be shown to explain why nothing happen when
interactively call ledger-occur.
Well, we still deactivate it when regex is nil, but the function
should not look at previous value of ledger-occur-mode:
- the interactive function (ledger-occur) already do it, we don't need
to do it there,
- caller that want to deactivate the occur stuff only have to call
ledger-occur with a nil regex
- the old behavior make ledger-reconcile to turn off occur stuff if it
was already turn on, when what we do want is that the occur stuff
change to the new account.
Based on loccur. Hides everything but the xacts that match a regex. Linked to reconcile mode so that when you reconcile an account on xacts with that account are shown. Documentation updated
