* lily/tie-formatting-problem.cc (score_configuration): use

* lily/tie-formatting-problem.cc (score_configuration): use
sliding score for min-length.

* lily/tie-formatting-problem.cc (set_chord_outline): put dots
in outline too.
(generate_configuration): for small ties, also look for collisions
at Y + DIR*h + DELTA_Y.
(get_variations): consider variation for dot positions too.