diff --git a/sklearn/tree/_tree.pyx b/sklearn/tree/_tree.pyx
index 56809f7c4ee71..486bad115787c 100644
--- a/sklearn/tree/_tree.pyx
+++ b/sklearn/tree/_tree.pyx
@@ -1189,7 +1189,7 @@ cdef class BaseTree:
         """Update a node on the tree.
 
         The updated node remains on the same position.
-        
+
         Returns (intp_t)(-1) on error.
         """
         cdef intp_t node_id