Replace ints with ints

examples/variadic-functions/variadic-functions.go

@@ -8,7 +8,7 @@ package main
 import "fmt"
 
 // Here's a function that will take an arbitrary number
-// of `ints` as arguments.
+// of `int`s as arguments.
 func sum(nums ...int) {
     fmt.Print(nums, " ")
     total := 0