Do not use coll which is a protected member

[exoego]

In Scala 2.13.0 and 2.13.4,

The below will not compile

  def lazyMap[T, U](coll: Iterable[T], f: T => U): Iterable[U] = new Iterable[U] {
    def iterator: Iterator[U] = coll.iterator map f
  }

The argument coll is shadowed by the protected member of Iterable trait.
Ref. https://github.com/scala/scala/blob/1851c5d637e55c8af786f428bddc9758a44c583c/src/library/scala/collection/Iterable.scala#L34

[SethTisue]

thank you!