1 files changed, 4 insertions, 4 deletions
diff --git a/prolog/problems/lists/insert_3/en.py b/prolog/problems/lists/insert_3/en.py
index 6a3da54..c4640ab 100644
--- a/prolog/problems/lists/insert_3/en.py
+++ b/prolog/problems/lists/insert_3/en.py
@@ -6,10 +6,10 @@ slug = 'insert an element into list'
 description = '''\
 <p><code>insert(X, L1, L2)</code>: the list <code>L2</code> is obtained from <code>L1</code> by inserting the element <code>X</code> at arbitrary position.</p>
 <pre>
-  ?- insert(1, [2,3], L).
-    L = [1,2,3] ;
-    L = [2,1,3] ;
-    L = [2,3,1].
+?- insert(1, [2,3], L).
+  L = [1,2,3] ;
+  L = [2,1,3] ;
+  L = [2,3,1].
 </pre>'''
 
 hint = {}