tweak advanced

[lambda.git] / miscellaneous_lambda_challenges_and_advanced_topics.mdwn

diff --git a/miscellaneous_lambda_challenges_and_advanced_topics.mdwn b/miscellaneous_lambda_challenges_and_advanced_topics.mdwn
index a3d65e2..173ddbe 100644 (file)
--- a/miscellaneous_lambda_challenges_and_advanced_topics.mdwn
+++ b/miscellaneous_lambda_challenges_and_advanced_topics.mdwn
@@ -500,16 +500,16 @@ can use.
        *leaf* of the tree, or it will have exactly two children.
 
        There are two kinds of trees to think about. In one sort of tree, it's only
-       the tree's *leaves* that are labeled:
+       the tree's leaves that are labeled:
 
-                   +
+                   .
                   / \ 
-          +   3
+          .   3
                 / \
                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.