docs(removeDuplicate): fix subject

- fix identation
- added missing imports and package

subjects/removeduplicate/README.md

@@ -2,8 +2,8 @@
 
 ### Instructions
 
-- Write a function that takes in a slice of integers and returns the slice where all duplicate integers have been removed.
-- If the slice is empty, return the slice itself
+Write a function that takes a slice of integers as an argument and returns the slice where all duplicate integers have been removed.
+- If the slice is empty, return the slice itself.
 
 ### Expected function
 
@@ -15,19 +15,22 @@ func RemoveDuplicate(slice []int) []int {
 
 ### Usage
 
-Here is a possible program to test your function :
+Here is a possible program to test your function:
 
 ```go
 package main
 
 import (
 	"fmt"
+
+	"piscine"
 )
 
 func main() {
-	fmt.Println(RemoveDuplicate([]int{1,2,3,3,4,5,6,7,8,9,10}))
-    fmt.Println(RemoveDuplicate([]int{1,1,2,2,3}))
+	fmt.Println(piscine.RemoveDuplicate([]int{1, 2, 3, 3, 4, 5, 6, 7, 8, 9, 10}))
+	fmt.Println(piscine.RemoveDuplicate([]int{1, 1, 2, 2, 3}))
 }
+
 ```
 
 And its output :