FIX revert cython changes (#351)

* FIX implement additional fix for pruning

* STY cython-lint honesty pyx

* DOC update version number

* FIX revert cython changes

* STY cython-lint honesty file

Author: PSSF23

treeple/tree/honesty/_honest_prune.pyx

@@ -153,6 +153,10 @@ cdef class HonestPruner(Splitter):
 
                 n_missing += 1
                 current_end -= 1
+
+            # Leverage sklearn's forked API to compute the feature value at this split node
+            # and then compare that to the corresponding threshold
+            # Note: this enables the function to work w/ both axis-aligned and oblique splits.
             elif p > pos and (self.tree._compute_feature(X_ndarray, sample_idx, &self.tree.nodes[node_idx])<= threshold):
                 self.samples[p], self.samples[pos] = \
                     self.samples[pos], self.samples[p]
@@ -368,9 +372,8 @@ cdef _honest_prune(
             split_is_degenerate = (
                 pruner.n_left_samples() == 0 or pruner.n_right_samples() == 0
             )
-            # is_leaf_in_origtree = child_l[node_idx] == _TREE_LEAF
-            # consider whether left or right children node is a leaf node.
-            is_leaf_in_origtree = (child_l[node_idx] == _TREE_LEAF and child_r[node_idx] == _TREE_LEAF)
+
+            is_leaf_in_origtree = child_l[node_idx] == _TREE_LEAF
 
             if invalid_split or split_is_degenerate or is_leaf_in_origtree:
                 # invalid_split or is_leaf_in_origtree: