Default hint for an assignment

hint.for.assign(
  expr,
  ps = get.ps(),
  env = ps$stud.env,
  stud.expr.li = ps$stud.expr.li,
  part = ps$part,
  s3.method = NULL,
  expr.object = NULL,
  start.char = "\n",
  end.char = "\n",
  ...
)