docs(wordflip): formatting and improve instructions

subjects/wordflip/README.md

@@ -1,12 +1,12 @@
-# wordflip
+## wordflip
 
 ### Instructions
 
-Write a function `WordFlip()` that receives a string and returns it with the first and last words flipped.
+Write a function `WordFlip()` that receives a `string` and returns it with the first and last words flipped.
 
 - Prints the Output followed by newline `\n`.
 - If the string is empty, return `Invalid Output`.
-- Ignore spaces if it's more then onr space in between words and all spaces in the edge of the words or sentences.
+- Ignore spaces if it's more then one space in between words and all spaces in the edge of the words or sentences.
 
 ### Expected function
 
@@ -23,19 +23,22 @@ Here is a possible program to test your function:
 ```go
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"piscine"
+)
 
 func main() {
-  fmt.Print(WordFlip("First second last"))
-  fmt.Print(WordFlip(""))
-  fmt.Print(WordFlip("     "))
-  fmt.Print(WordFlip(" hello  all  of  you! "))
+	fmt.Print(piscine.WordFlip("First second last"))
+	fmt.Print(piscine.WordFlip(""))
+	fmt.Print(piscine.WordFlip("     "))
+	fmt.Print(piscine.WordFlip(" hello  all  of  you! "))
 }
 ```
 
 And its output:
 
-```go
+```console
 $ go run . | cat -e
 last second First$
 Invalid Output$