tie in TabStaff displays one of the unisone notes in a chord

[Federico Bruni]

In default tablature tied notes are hided. But if a chord contains two 
identical pitches (played on different strings), one of them is 
displayed (the one with the string number indication).

See this example:

\version "2.17.9"

music =  \relative c' {
  <b\3 b g'>8 ~ q
  <g\4 g d'>8 ~ q
}

\score {
  \new StaffGroup <<
    \new Staff <<
      \context Voice { \clef "G_8" \music }
    >>
    \new TabStaff  <<
      \context TabVoice { \clef "moderntab" \music }
    >>
  >>
}

TabStaff_tie_unison-chord.png
Description: PNG image