Fix clippy warnings

Author: Juan-M-V

src/dict_manager.rs

@@ -24,6 +24,12 @@ pub struct PyDictTracker {
     key: Relocatable,
 }
 
+impl Default for PyDictManager {
+    fn default() -> Self {
+        PyDictManager::new()
+    }
+}
+
 #[pymethods]
 impl PyDictManager {
     #[new]
@@ -139,13 +145,13 @@ impl PyDictTracker {
         val: PyMaybeRelocatable,
         py: Python,
     ) -> PyResult<()> {
-        match (&key, val) {
+        match (&key, &val) {
             (PyMaybeRelocatable::Int(key), PyMaybeRelocatable::Int(val)) => {
                 self.manager
                     .borrow_mut()
                     .get_tracker_mut(&self.key)
                     .map_err(to_py_error)?
-                    .insert_value(&key, &val);
+                    .insert_value(key, val);
 
                 Ok(())
             }

src/ids.rs

@@ -100,7 +100,7 @@ impl PyIds {
 
             if self
                 .struct_types
-                .contains_key(cairo_type.trim_end_matches("*"))
+                .contains_key(cairo_type.trim_end_matches('*'))
             {
                 let addr =
                     compute_addr_from_reference(hint_ref, &self.vm.borrow(), &self.ap_tracking)?;
@@ -115,7 +115,7 @@ impl PyIds {
                 return Ok(PyTypedId {
                     vm: self.vm.clone(),
                     hint_value: dereferenced_addr,
-                    cairo_type: cairo_type.trim_end_matches("*").to_string(),
+                    cairo_type: cairo_type.trim_end_matches('*').to_string(),
                     struct_types: Rc::clone(&self.struct_types),
                 }
                 .into_py(py));