docs(shoppinglistsort): fix subject information

subjects/shoppinglistsort/README.md

@@ -2,14 +2,14 @@
 
 ### Instructions
 
-You were sent to the supermarket with a shopping list. To make your shopping faster, write a function `ShoppingListSort()` that takes an array of strings and sorts it, according to the string length, returning an array in which the strings appear in ascending order.
+You were sent to the supermarket with a shopping list. To make your shopping faster, write a function `ShoppingListSort()` that takes a slice of strings and sorts it, according to the string length, returning a slice in which the strings appear in ascending order.
 
 When the length of string elements are equal, then the order in which they appear does not matter.
 
 ### Expected function
 
 ```go
-func ShoppingListSort(array[] string)[]string {
+func ShoppingListSort(slice []string) []string {
 
 }
 ```
@@ -22,19 +22,19 @@ Here is a possible program to test your function:
 package main
 
 import (
-  "fmt"
-  "piscine"
+        "fmt"
+        "piscine"
 )
 
 func main() {
-  array:= []string{"Banana", "Mushroom", "Salt", "Pepper","Tea", "Milk"}
-  fmt.Println(piscine.ShoppingListSort(array))
+        slice := []string{"Banana", "Mushroom", "Salt", "Pepper","Tea", "Milk"}
+        fmt.Println(piscine.ShoppingListSort(slice))
 }
 ```
 
 And its output:
 
-```go
+```console
 $ go run . | cat -e
 [Tea Salt Milk Banana Pepper Mushroom]$
 ```