Bug: q doesn't keep fingerings in TabStaff context

[Christopher Heckman]

I searched for this at the archives, but maybe I didn't look in the right place.

The title is pretty self-expanatory. If the pitch e is normally played
on the 5th string of a guitar (after transposition), then

\new TabStaff { <e\6> q }

will show e played on the 6th string and then on the 5th string, even
if you put a tie after <e\6>.

(This is Lilypond version 2.18.)

--- Christopher Carl Heckman