remaning and reformating of instructions

subjects/itoa.en.md

@@ -0,0 +1,15 @@
+## itoa
+
+### Instructions
+
+- Write a function that simulates the behaviour of the `Itoa` function in Go. `Itoa` transforms a number represented as an`int` in a number represented as a `string`.
+
+- For this exercise the handling of the signs + or - **does have** to be taken into account.
+
+## Expected function
+
+```go
+func Itoa(n int) string {
+
+}
+```

subjects/itoa.md

@@ -1,14 +0,0 @@
-## itoa
-
-### Instructions
-
-Write a function that takes an int and converts it to a string.
-The function returns the result in a char array that you must allocate.
-
-## Expected function
-
-```go
-func Itoa(n int) int {
-
-}
-```