don't panic if file already exists

src/main.rs

@@ -39,8 +39,10 @@ fn move_file(file: PathBuf, mut destination: PathBuf) {
 
     destination.push(file_name);
 
-    fs_extra::file::move_file(file, destination, &Default::default())
-        .expect("Couldn't move file");
+    match fs_extra::file::move_file(file, destination, &Default::default()) {
+        Ok(_)          => println!("OK!"),
+        Err(e) => println!("Couldn't move file: {:?}", e),
+    }
 }
 
 fn yes() -> bool {