Improve docstring for _is_balanced function

joowani · joowani · commit 5ff28f7f778d · 2020-03-01T01:58:27.000-08:00
diff --git a/binarytree/__init__.py b/binarytree/__init__.py
@@ -18,7 +18,7 @@
 
 
 def _is_balanced(root):
-    """Return the height if the binary tree is balanced, -1 otherwise.
+    """Return the tree height + 1 if balanced, -1 otherwise.
 
     :param root: Root node of the binary tree.
     :type root: binarytree.Node | None
