Merge pull request #2 from jerryrwu/master

fixed conditional

Author: Bibeknam

data-structures/red-black-trees/red_black_tree.py

@@ -88,7 +88,7 @@ def __fix_delete(self, x):
                     self.right_rotate(x.parent)
                     s = x.parent.left
 
-                if s.right.color == 0 and s.right.color == 0:
+                if s.left.color == 0 and s.right.color == 0:
                     # case 3.2
                     s.color = 1
                     x = x.parent
@@ -378,4 +378,4 @@ def pretty_print(self):
     bst.insert(40)
     bst.insert(80)
     bst.delete_node(25)
-    bst.pretty_print()
+    bst.pretty_print()