tweak advanced

Signed-off-by: Jim Pryor <profjim@jimpryor.net>

diff --git a/miscellaneous_lambda_challenges_and_advanced_topics.mdwn b/miscellaneous_lambda_challenges_and_advanced_topics.mdwn
index dafb3d5..173ddbe 100644 (file)
--- a/miscellaneous_lambda_challenges_and_advanced_topics.mdwn
+++ b/miscellaneous_lambda_challenges_and_advanced_topics.mdwn
@@ -509,7 +509,7 @@ can use.
                1   2 
 
        Linguists often use trees of this sort. The inner, non-leaf nodes of the
                1   2 
 
        Linguists often use trees of this sort. The inner, non-leaf nodes of the

-tree have associated values. But what values they are can be determined from
+tree do have associated values. But what values they are can be determined from

 the structure of the tree and the values of the node's left and right children.
 So the inner node doesn't need its own independent label.
 
 the structure of the tree and the values of the node's left and right children.
 So the inner node doesn't need its own independent label.