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-rw-r--r--prolog/problems/denotational_semantics/prog_listswap_3/en.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/prolog/problems/denotational_semantics/prog_listswap_3/en.py b/prolog/problems/denotational_semantics/prog_listswap_3/en.py
index 5e85ce6..ad9dcf8 100644
--- a/prolog/problems/denotational_semantics/prog_listswap_3/en.py
+++ b/prolog/problems/denotational_semantics/prog_listswap_3/en.py
@@ -9,8 +9,8 @@ description = '''\
<p>The meaning of a word (program) in this language has the form <code>In-->Out</code>, mapping from input to output lists. Besides the list contents, internal states also hold the current cursor position. The <code>left</code> and <code>right</code> instructions move the cursor one step in the given direction, while the <code>swap</code> instruction swaps the element under the cursor with its left neighbor (and fails if cursor is currently pointing to the first element of the list).</p>
<pre>
- ?- prog_listswap([1,2,3,4]-->Out, [begin,right,swap,end], []).
- Out = [2,1,3,4].
+?- prog_listswap([1,2,3,4]-->Out, [begin,right,swap,end], []).
+ Out = [2,1,3,4].
</pre>
<p>Helper predicate (already defined):<br />