Show the hint if the student made the specified wrong call

Show the hint if the student made the specified wrong call

hint.stud.call(
  call,
  msg = "",
  ps = get.ps(),
  env = parent.frame(),
  qcall,
  var = NULL
)

Arguments

call	an unquoted call that we check whether the student makes it
msg	a string that shall be shown as hint if the student made the call in his code