New predefined command

[Patrick McCarty]

Hi list,

I have just documented the new "parenthesis" style arpeggio bracket
that Han-Wen created a while back.  Here is a link to the News item:

http://lilypond.org/doc/v2.11/Documentation/topdocs/NEWS

Since it involves two \override commands, it might be nice to have a
predefined command for this new feature.  Is this a good idea?

I think an \arpeggioParen command might be suitable.

Thanks,
Patrick