fix some sintax erros in listat readme

subjects/listat.en.md

@@ -2,20 +2,20 @@
 
 ### Instructions
 
-Write a function `ListAt` that haves one pointer to the list, `l`, and an `int` as parameters. This function should print a `Node` of the linked list, depending on the number, `nbr`.
+Write a function `ListAt` that takes one pointer to the list, `l`, and an `int` as parameters. This function should print a `NodeL` in the position `pos` in the linked list.
 
 - In case of error it should print `nil`
 
 ### Expected function and structure
 
 ```go
-type Node struct {
+type NodeL struct {
 	Data interface{}
-	Next *Node
+	Next *NodeL
 }
 
 
-func ListAt(l *Node, nbr int) *Node{
+func ListAt(l *NodeL, pos int) *NodeL{
 
 }
 ```
@@ -33,18 +33,16 @@ import (
 )
 
 func main() {
-	link := &Node{}
+	link := &piscine.List{}
 
-	ListPushBack(link, "hello")
-	ListPushBack(link, "how are")
-	ListPushBack(link, "you")
-	ListPushBack(link, 1)
+	piscine.ListPushBack(link, "hello")
+	piscine.ListPushBack(link, "how are")
+	piscine.ListPushBack(link, "you")
+	piscine.ListPushBack(link, 1)
 
-	fmt.Println()
-
-	fmt.Println(ListAt(link, 3).Data)
-	fmt.Println(ListAt(link, 1).Data)
-	fmt.Println(ListAt(link, 7))
+	fmt.Println(piscine.ListAt(link.Head, 3).Data)
+	fmt.Println(piscine.ListAt(link.Head, 1).Data)
+	fmt.Println(piscine.ListAt(link.Head, 7))
 }
 
 ```
@@ -54,8 +52,8 @@ And its output :
 ```console
 student@ubuntu:~/piscine/test$ go build
 student@ubuntu:~/piscine/test$ ./test
-you
-hello
+1
+how are
 <nil>
 student@ubuntu:~/piscine/test$
-```
+```