Rewrite words and groups into result

src/data_provider/card_stats.rs

@@ -25,9 +25,7 @@ pub fn load_stats_of_deck(
         .map_err(|_| DbLoadError)?;
 
     let mut buffer = Vec::with_capacity(512);
-    for word in iter.filter_map(|result| result.ok()) {
-        buffer.push(word);
-    }
+    iter.filter_map(|res| res.ok()).for_each(|i| buffer.push(i));
 
     Ok(buffer)
 }