2.1.22 - A problem and a question

[Tyler Eaves]

One bug has become apparent to me in 2.1.22, and possibly
earlier 2.1.xx releases.

When using tablature, the number of lines on the staff should
vary based on Tabstaff.stringTunings.

Your own documentation demonstates the problem,
on the 'Non-guitar tablatures' page. There are
additional top and bottom lines beyond the
four that should be present in the example.
I know this worked with 2.0.x

Also, is it possible to use simulataneous music (<< >>)
in \drums? It doesn't seem to work. This is really needed
for practical drum notation, as habing two seperate voices
is just too likely to be a source for errors.