gistfile1.txt

def grab_ssn(string)
ssn = /\d{3}-\d{2}-\d{4}/.match(string).to_s

  if string.include?(ssn)
  return ssn
  else
  return nil
  end
end

#I keep on getting this message from the test " 
Error!
grab_ssn returns nil if it doesn't have a SSN
expected: nil got: ""