code cleanup

src/data_provider/mod.rs

@@ -1,8 +1,7 @@
-pub(crate) mod words;
 pub(crate) mod card_sets;
 pub(crate) mod card_stats;
-pub(crate) mod voice;
+pub(crate) mod history;
 pub(crate) mod settings;
 pub(crate) mod sqlite;
-pub(crate) mod history;
-
+pub(crate) mod voice;
+pub(crate) mod words;