style: fix formatting (cargo fmt)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: zazabap

problemreductions-cli/src/commands/graph.rs

@@ -259,7 +259,6 @@ pub(crate) fn variant_to_full_slash(variant: &BTreeMap<String, String>) -> Strin
     }
 }
 
-
 /// Format a problem node as **bold name/variant** in slash notation.
 /// This is the single source of truth for "name/variant" display.
 fn fmt_node(_graph: &ReductionGraph, name: &str, variant: &BTreeMap<String, String>) -> String {

src/rules/mod.rs

@@ -9,8 +9,8 @@ mod circuit_spinglass;
 mod coloring_qubo;
 mod factoring_circuit;
 mod graph;
-mod knapsack_qubo;
 mod kcoloring_casts;
+mod knapsack_qubo;
 mod ksatisfiability_casts;
 mod ksatisfiability_qubo;
 mod maximumindependentset_casts;

src/unit_tests/rules/knapsack_qubo.rs

@@ -18,8 +18,7 @@ fn test_knapsack_to_qubo_closed_loop() {
         .iter()
         .map(|t| reduction.extract_solution(t))
         .collect();
-    let source_set: std::collections::HashSet<Vec<usize>> =
-        best_source.into_iter().collect();
+    let source_set: std::collections::HashSet<Vec<usize>> = best_source.into_iter().collect();
 
     assert!(extracted.is_subset(&source_set));
     assert!(!extracted.is_empty());