message: Fix empty input handling of fromUserInput
diff: @@ -24,7 +24,10 @@ export class Decimal {
  let whole: string;
  let fractional: string;
  - if (input.search(/\./) === -1) {
  + if (input === "") {
  + whole = "0";
  + fractional = "";
  + } else if (input.search(/\./) === -1) {
  // integer format, no separator
  whole = input;
  fractional = "";
  