docs(fifthandskip): instructions upgrade

subjects/fifthandskip/README.md

@@ -4,8 +4,9 @@
 
 Write a function `FifthAndSkip()` that takes a `string` and returns another `string`. The function separates every five characters of the `string` with a space and removes the sixth one.
 
-- If there is a space in the middle of a word it should ignore it and get the first character until getting to a length of 5.
-- If the `string` is less than 5 characters returns "Invalid Output\n".
+- If there are spaces in the middle of a word, ignore them and get the first character after the spaces until you reach a length of 5.
+- If the `string` is less than 5 characters returns `Invalid Output` followed by a newline `\n`.
+- If the `string` is empty return a newline `\n`.
 
 ### Expected function