Fix docstring

Signed-off-by: Adam Li <adam2392@gmail.com>

Author: adam2392

sklearn/ensemble/_forest.py

@@ -817,12 +817,11 @@ def get_leaf_node_samples(self, X):
 
         Returns
         -------
-        leaf_node_samples : a list of array-like of shape
-                (n_leaf_node_samples, n_outputs)
+        leaf_node_samples : a list of array-like
             Each sample is represented by the indices of the training samples that
             reached the leaf node. The ``n_leaf_node_samples`` may vary between
             samples, since the number of samples that fall in a leaf node is
-            variable.
+            variable. Each array-like has shape (n_leaf_node_samples, n_outputs).
         """
         check_is_fitted(self)
         # Check data