message: Rename variable to correct math term
diff: @@ -36,9 +36,9 @@ export function Counter(params: Params): Counter {
  function add(n: number): Counter {
  if (n !== 0) {
  - const one = n / Math.abs(n)
  - set(get() + one)
  - return add(n + one * -1)
  + const sign = n / Math.abs(n)
  + set(get() + sign)
  + return add(n + sign * -1)
  }
  return self
  }
  