message: fix(chunk): remove concat single -> append rewrite
diff: @@ -89,12 +89,6 @@ export abstract class Chunk<A> implements Iterable<A> {
  if (that._typeId === EmptyTypeId) {
  return this
  }
  - if (that._typeId === SingletonTypeId) {
  - return this.append(that.a)
  - }
  - if (this._typeId === SingletonTypeId) {
  - return that.prepend(this.a)
  - }
  if (this._typeId === AppendNTypeId) {
  const chunk = fromArray(this.buffer as A1[]).take(this.bufferUsed)
  return this.start.concat(chunk).concat(that)
  