respect lintr no lint comment position

Not sure if this is intentional, but when I have a # nolint comment at the function definition it gets shifted a line below and effectively removing the no lint command for that line:

before formatting:

as_task_fcst.TaskFcst = function(x, clone = FALSE, ...) { # nolint
  if (clone) x$clone() else x
}

after formatting:

as_task_fcst.TaskFcst = function(x, clone = FALSE, ...) {
  # nolint
  if (clone) x$clone() else x
}

Start by reproducing the formatting example in the issue and trace how the formatter handles an inline # nolint comment on a function definition. Done means formatting preserves the comment's association with the function line so lintr still ignores the intended line, with coverage for this before-and-after case.