Adjusting the shape of falls and doits

The shortest-duration-space property may be tweaked to adjust the shape of falls and doits.

\version "2.24.0"

\relative c'' {
  \override Score.SpacingSpanner.shortest-duration-space = 4.0
  c2-\bendAfter 5
  c2-\bendAfter -4.75
  c2-\bendAfter 8.5
  c2-\bendAfter -6
}