nil output

Is there an easy way to change the way ruby outputs nil's. Such that ""
is output instead? The reason for this, is due to the amount of space a
large array can occupy if containing several thousand empty cells as
opposed to one which prints out "".

Alternately, you can override the inspect method:

class NilClass
  def inspect
    "!" # I prefer a bang, to empty quotes
  end
end

-Kyle