following a simple layout

(three expressions at-the-start
  two in
  the middle
  many at the end)
(with-indentation (lambda (name)
    always proportional to nesting depth))
  • it is dead simple: one pattern and a simple indent calculation
  • it makes it particularly easy to predict where the next line should start and how deeply it is nested
  • it makes the code look more orderly, the complexity and structure easier to grasp