Add doc

Author: k-nasa

src/stream/from_iter.rs

@@ -6,6 +6,12 @@ use crate::stream::Stream;
 use crate::task::{Context, Poll};
 
 pin_project! {
+ /// A stream that created from iterator
+ ///
+ /// This stream is created by the [`from_iter`] function.
+ /// See it documentation for more.
+ ///
+ /// [`from_iter`]: fn.from_iter.html
  #[derive(Debug)]
  pub struct FromIter<I> {
  iter: I,