diff --git a/src/ast/compiler/binder.rs b/src/ast/compiler/binder.rs
index 5e2ff26..bb2078a 100644
--- a/src/ast/compiler/binder.rs
+++ b/src/ast/compiler/binder.rs
@@ -411,7 +411,10 @@ impl Binder {
                     // Global Definition in pattern
                     let mut globals = self.globals.borrow_mut();
                     if globals.contains_key(sym) {
-                        return Err(format!("Global variable '{}' is already defined.", sym.name));
+                        return Err(format!(
+                            "Global variable '{}' is already defined.",
+                            sym.name
+                        ));
                     }
                     let idx = globals.len() as u32;
                     globals.insert(sym.clone(), idx);
diff --git a/src/ast/compiler/type_checker.rs b/src/ast/compiler/type_checker.rs
index 5c435f3..7f1d7ec 100644
--- a/src/ast/compiler/type_checker.rs
+++ b/src/ast/compiler/type_checker.rs
@@ -145,9 +145,7 @@ impl TypeChecker {
                 (BoundKind::Parameter { name, slot }, specialized_ty.clone())
             }
             BoundKind::DefGlobal {
-                name,
-                global_index,
-                ..
+                name, global_index, ..
             } => {
                 self.global_types
                     .borrow_mut()
diff --git a/src/ast/vm.rs b/src/ast/vm.rs
index b2d6a12..4acbefa 100644
--- a/src/ast/vm.rs
+++ b/src/ast/vm.rs
@@ -392,7 +392,10 @@ impl VM {
                         }
                         Value::Function(f) => return Ok((f.func)(arg_vals)),
                         _ => {
-                            return Err(format!("Tail call target is not a function: {}", func_val));
+                            return Err(format!(
+                                "Tail call target is not a function: {}",
+                                func_val
+                            ));
                         }
                     }
                 }
diff --git a/src/integration_test.rs b/src/integration_test.rs
index 1ebeb58..d4155b4 100644
--- a/src/integration_test.rs
+++ b/src/integration_test.rs
@@ -322,7 +322,8 @@ mod tests {
         assert_eq!(format!("{}", env.run_script(source_global).unwrap()), "3");
 
         // 2. Local nested destructuring inside a function
-        let source_local = "((fn [x] (do (def [a [[b c] d]] x) (+ a (+ b (+ c d))))) [1 [[2 3] 4]])";
+        let source_local =
+            "((fn [x] (do (def [a [[b c] d]] x) (+ a (+ b (+ c d))))) [1 [[2 3] 4]])";
         assert_eq!(format!("{}", env.run_script(source_local).unwrap()), "10");
 
         // 3. Verify 'def' returns the assigned value