add a comment to main

Cargo.lock

@@ -4,4 +4,4 @@ version = 4
 
 [[package]]
 name = "hello-world"
-version = "0.1.0"
+version = "0.2.0"

src/main.rs

@@ -2,6 +2,7 @@
 ///
 /// Crastimus Maximilian
 
+/// add documentation for main
 fn main() {
     print("Hello, world!");
     print("Goodbye!");