#4711 bendAfter ignored by horizontal spacing

[Simon Albrecht]

Thomas Morley reported two problems:
– BendAfter may collide with the subsequent note’s accidental
– and it’s not possible to set minimum-length using a rod.

\version "2.19.32"

%% (1)
%% Collision Accidental/BendAfter
{
  c''2\bendAfter #2
  deses''
}

%% (2)
%% 'minimum-length can't be reasonably applied
%% NR suggests to use:
%% \override Score.SpacingSpanner.shortest-duration-space = #4.0
%% But I'd say that's strange.
{
  \override BendAfter #'springs-and-rods = #ly:spanner::set-spacing-rods
  \override BendAfter #'minimum-length = #8
    c''2\bendAfter #2
    d''
}