Lyric extenders go on too long when lyrics stop

[David Feuer]

I don't know if this is related to the other extender problem I just
reported.  It looks rather different to me (the lyric extender goes
too far, but doesn't go on forever).

Example:

\version "2.11.19"

<<
 \relative c'' {
   a2 b
 }
 \addlyrics { one __  }
> >

% If this is changed to \addlyrics { one __ two } then the extender is short.


% I seem to remember that examples are supposed to be ragged right.
Is it possible
% to do this without writing explicit \score and \layout blocks?