Fixes all clippy warnings

src/static_data/libraries/data_library.rs

@@ -43,6 +43,6 @@ pub trait DataLibrary<'a, T: 'a> {
     /// Gets a random value from the library.
     fn random_value(&self, rand: &mut Random) -> &T {
         let i = rand.get_between(0, self.len() as i32);
-        return &self.map().get_index(i as usize).unwrap().1;
+        return self.map().get_index(i as usize).unwrap().1;
     }
 }

src/static_data/libraries/mod.rs

@@ -17,12 +17,21 @@ pub use static_data::StaticData;
 #[doc(inline)]
 pub use type_library::*;
 
+/// The library data for abilities.
 mod ability_library;
+/// Basic helper trait for libraries.
 mod data_library;
+/// The library data for groth rates.
 mod growth_rate_library;
+/// The library data for items.
 mod item_library;
+/// The library data for misc settings.
 mod library_settings;
+/// The library data for moves.
 mod move_library;
+/// The library data for species.
 mod species_library;
+/// The combination of all libraries.
 pub(crate) mod static_data;
+/// The library data for types.
 mod type_library;