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-rw-r--r--prolog/problems/trees/numberbt_2/en.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/prolog/problems/trees/numberbt_2/en.py b/prolog/problems/trees/numberbt_2/en.py
index 3be193d..99dc9ca 100644
--- a/prolog/problems/trees/numberbt_2/en.py
+++ b/prolog/problems/trees/numberbt_2/en.py
@@ -6,8 +6,8 @@ slug = 'find the number of nodes in a binary tree'
description = '''\
<p><code>numberBT(T, N)</code>: <code>N</code> is the number of nodes in the binary tree <code>T</code>.</p>
<pre>
- ?- numberBT(b(b(nil,2,nil),1,b(nil,3,nil)), N).
- N = 3.
+?- numberBT(b(b(nil,2,nil),1,b(nil,3,nil)), N).
+ N = 3.
</pre>'''
hint = {}