Unify fn signature in iterators4 exercise and solution

Nahor · Nahor · commit a33501e6a7b9 · 2024-07-04T14:23:34.000-07:00
Since this is not about conversion, prefer the option that doesn't
require one.
diff --git a/exercises/18_iterators/iterators4.rs b/exercises/18_iterators/iterators4.rs
@@ -1,4 +1,4 @@
-fn factorial(num: u8) -> u64 {
+fn factorial(num: u64) -> u64 {
     // TODO: Complete this function to return the factorial of `num`.
     // Do not use:
     // - early returns (using the `return` keyword explicitly)

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-fn factorial(num: u8) -> u64 {`
	`1`	`+fn factorial(num: u64) -> u64 {`
`2`	`2`	// TODO: Complete this function to return the factorial of `num`.
`3`	`3`	`// Do not use:`
`4`	`4`	// - early returns (using the `return` keyword explicitly)