clippy: use sort_unstable().

src/simple_lottery/algorithm.rs

@@ -16,7 +16,7 @@ pub(super) fn prove(setup: &Setup, prover_set: &[Element]) -> Option<Proof> {
             element_sequence.push(element);
         }
         if prover_set.len() as u64 >= setup.proof_size {
-            element_sequence.sort();
+            element_sequence.sort_unstable();
             return Some(Proof { element_sequence });
         }
     }

src/utils/misc.rs

@@ -3,6 +3,6 @@ use super::types::Element;
 /// Returns true iff all elements in the slice are distinct.
 pub(crate) fn check_distinct(elements: &[Element]) -> bool {
     let mut elements = elements.to_vec();
-    elements.sort();
+    elements.sort_unstable();
     elements.is_sorted_by(|a, b| a < b)
 }