Way to enforce styling multiline-singleline styling?

[ctsimpouris]

Module is really nice. My question, is there a way to enforce one of the following? For example, valid

.cartPrice {
  text-align: right;
  white-space: nowrap;
  width: 1%;
}

Invalid, example or anything not like the above

.cartPrice { text-align: right; white-space: nowrap; width: 1%; }