Suggest rerunning empty-dirs if dupes found.

src/main.rs

@@ -71,6 +71,9 @@ fn print_dupes(lib: &MovieLibrary) {
     for path in &delete_paths {
         println!(r#"mv "{}" /storage/media/to-be-deleted/"#, path);
     }
+    if delete_paths.len() > 0 {
+        println!("superdeduper update-compact-metadata && superdeduper empty-dirs")
+    }
 }
 
 fn print_all(videos: HashMap<String, CompactMetadata>) {