Fix clippy::unit_arg

Author: cuviper

src/crand.rs

@@ -70,7 +70,8 @@ fn test_rng() -> impl RngCore {
         }
 
         fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand::Error> {
-            Ok(self.fill_bytes(dest))
+            self.fill_bytes(dest);
+            Ok(())
         }
     }