Enhancement request: automatic polyphony in TabStaff context

[Patrick Schmidt]

Dear developers,

thank you all for Lilypond! I'm very fond of it.

While trying to engrave a piece with polyphonic elements both  
"traditionally" (with noteheads) and with tablature I found out that  
it is not possible to get the tablature right with the following code:

\version "2.13.3"
poly = \relative c'' {
        << {c1} \\ {a4 g f e} >> a,1
        %{ << { \voiceOne c1}
        \new Voice { \voiceTwo a'4 g f e }
        >> \oneVoice a,1 %}
}

\score {
      \new TabStaff = "guitar tab" <<
      \context TabVoice
      \poly
      >>
}

I finally engraved my piece with the snippet "polyphony in tablature"  
so I know there already exists a solution to this problem but I think  
it would be quite handy (and logical) if it were possible to apply <<  
{} \\ {} >> to
tabVoice if it's in a tabStaff context (especially when the piece  
doesn't contain an awful lot of polyphonic bars).

Thanks again for all your work!

patrick