docs(sliceRemove): fixed subject

- added one more output example
- fixed missing space

subjects/sliceremove/README.md

@@ -3,6 +3,7 @@
 ### Instructions
 
 Write a function that takes a slice of integers and an `int` as arguments, if the given `int` exists in the slice then remove it, otherwise return the slice.
+
 - If the slice is empty, return the slice itself.
 
 ### Expected function
@@ -29,6 +30,8 @@ import (
 func main() {
 	fmt.Println(piscine.SliceRemove([]int{1, 2, 3}, 2))
 	fmt.Println(piscine.SliceRemove([]int{4, 3}, 4))
+	fmt.Println(piscine.SliceRemove([]int{}, 1))
+	
 }
 ```
 
@@ -38,4 +41,5 @@ And its output:
 $ go run .
 [1 3]
 [3]
+[]
 ```