Add two more test cases

Author: camelid

src/test/ui/macros/issue-78333.rs

@@ -7,5 +7,7 @@ fn main() {
     ::std::todo!();
     ::std::unimplemented!();
     ::std::assert_eq!(0, 0);
+    ::std::assert_ne!(0, 1);
     ::std::dbg!(123);
+    ::std::unreachable!();
 }