4 files changed, 20 insertions, 22 deletions
diff --git a/lib/containers/intervaltree.go b/lib/containers/intervaltree.go
index 7b96526..d2e2732 100644
--- a/lib/containers/intervaltree.go
+++ b/lib/containers/intervaltree.go
@@ -39,7 +39,7 @@ type IntervalTree[K Ordered[K], V any] struct {
 	inner RBTree[intervalValue[K, V]]
 }
 
-func (t *IntervalTree[K, V]) attrFn(node *RBNode[intervalValue[K, V]]) {
+func (*IntervalTree[K, V]) attrFn(node *RBNode[intervalValue[K, V]]) {
 	max := node.Value.ValSpan.Max
 	if node.Left != nil && node.Left.Value.ChildSpan.Max.Compare(max) > 0 {
 		max = node.Left.Value.ChildSpan.Max
diff --git a/lib/containers/optional.go b/lib/containers/optional.go
index c0e7b32..5bb7bb6 100644
--- a/lib/containers/optional.go
+++ b/lib/containers/optional.go
@@ -1,4 +1,4 @@
-// Copyright (C) 2022  Luke Shumaker <lukeshu@lukeshu.com>
+// Copyright (C) 2022-2023  Luke Shumaker <lukeshu@lukeshu.com>
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -19,11 +19,10 @@ var (
 )
 
 func (o Optional[T]) MarshalJSON() ([]byte, error) {
-	if o.OK {
-		return json.Marshal(o.Val)
-	} else {
+	if !o.OK {
 		return []byte("null"), nil
 	}
+	return json.Marshal(o.Val)
 }
 
 func (o *Optional[T]) UnmarshalJSON(dat []byte) error {
diff --git a/lib/containers/rbtree.go b/lib/containers/rbtree.go
index 6182150..59f63aa 100644
--- a/lib/containers/rbtree.go
+++ b/lib/containers/rbtree.go
@@ -167,9 +167,8 @@ func (t *RBTree[T]) Subrange(rangeFn func(T) int, handleFn func(*RBNode[T]) bool
 	_, node := t.root.search(func(v T) int {
 		if rangeFn(v) <= 0 {
 			return -1
-		} else {
-			return 1
 		}
+		return 1
 	})
 	for node != nil && rangeFn(node.Value) > 0 {
 		node = node.Next()
diff --git a/lib/containers/rbtree_test.go b/lib/containers/rbtree_test.go
index d2fe931..c6e7a3b 100644
--- a/lib/containers/rbtree_test.go
+++ b/lib/containers/rbtree_test.go
@@ -108,25 +108,25 @@ func checkRBTree[T constraints.Ordered](t *testing.T, expectedSet Set[T], tree *
 }
 
 func FuzzRBTree(f *testing.F) {
-	Ins := uint8(0b0100_0000)
-	Del := uint8(0)
+	ins := uint8(0b0100_0000)
+	del := uint8(0)
 
 	f.Add([]uint8{})
-	f.Add([]uint8{Ins | 5, Del | 5})
-	f.Add([]uint8{Ins | 5, Del | 6})
-	f.Add([]uint8{Del | 6})
+	f.Add([]uint8{ins | 5, del | 5})
+	f.Add([]uint8{ins | 5, del | 6})
+	f.Add([]uint8{del | 6})
 
 	f.Add([]uint8{ // CLRS Figure 14.4
-		Ins | 1,
-		Ins | 2,
-		Ins | 5,
-		Ins | 7,
-		Ins | 8,
-		Ins | 11,
-		Ins | 14,
-		Ins | 15,
-
-		Ins | 4,
+		ins | 1,
+		ins | 2,
+		ins | 5,
+		ins | 7,
+		ins | 8,
+		ins | 11,
+		ins | 14,
+		ins | 15,
+
+		ins | 4,
 	})
 
 	f.Fuzz(func(t *testing.T, dat []uint8) {