update README

Author: tomoikey

README.md

@@ -242,7 +242,11 @@ fn main() -> anyhow::Result<()> {
 }
 ```
 # Iterator
-### IntoIter
+The Iterator I’ve prepared has into_iter and iter implemented.
+Therefore, you can easily map or convert it to a different Iterator using collect.
+Feel free to explore the capabilities of the Iterator you’ve been given!
+
+### `into_iter()`
 ```rust
 fn main() -> anyhow::Result<()> {
     let ne_vec = NonEmptyVec::new(vec![1, 2, 3])?;
@@ -252,7 +256,7 @@ fn main() -> anyhow::Result<()> {
 }
 ```
 
-### Iter
+### `iter()`
 ```rust
 fn main() -> anyhow::Result<()> {
     let ne_vec = NonEmptyVec::new(vec![1, 2, 3])?;
@@ -262,6 +266,16 @@ fn main() -> anyhow::Result<()> {
 }
 ```
 
+### `NonEmptyVec` to `NonEmptyVecDeque` using `collect()`
+```rust
+fn main() -> anyhow::Result<()> {
+    let ne_vec = NonEmptyVec::new(vec![1, 2, 3])?;
+    let ne_vec_deque: NonEmptyVecDeque<i32> = ne_vec.into_iter().collect();
+    assert_eq!(ne_vec_deque.into_value(), vec![1, 2, 3]);
+    Ok(())
+}
+```
+
 # Add Trait
 I have implemented the `Add` trait for a part of the `Refined` that I provided. Therefore, operations can be performed without downgrading the type level.
 ### NonEmptyString

src/rule/non_empty/non_empty_vec.rs

@@ -97,9 +97,8 @@ mod test {
     #[test]
     fn test_collect_to_deque() -> anyhow::Result<()> {
         let ne_vec = NonEmptyVec::new(vec![1, 2, 3])?;
-        let ne_vec: NonEmptyVecDeque<i32> =
-            ne_vec.into_iter().map(|n| n * 2).map(|n| n * 3).collect();
-        assert_eq!(ne_vec.into_value(), vec![6, 12, 18]);
+        let ne_vec: NonEmptyVecDeque<i32> = ne_vec.into_iter().collect();
+        assert_eq!(ne_vec.into_value(), vec![1, 2, 3]);
         Ok(())
     }