1 files changed, 8 insertions, 8 deletions
diff --git a/prolog/problems/denotational_semantics/algol_for_3/en.py b/prolog/problems/denotational_semantics/algol_for_3/en.py
index d4b8144..91ff34d 100644
--- a/prolog/problems/denotational_semantics/algol_for_3/en.py
+++ b/prolog/problems/denotational_semantics/algol_for_3/en.py
@@ -6,14 +6,14 @@ slug = 'interpreter for mini-algol with for-statement'
 description = '''\
 <p>Extend the given DCG for mini-algol to support the for-statement. Example:</p>
 <pre>
-  % for a := 0 & a < 5 & a := a + 1 do
-  % begin
-  %   print(a)
-  % end
-  ?- _Program = [begin,for,a,:=,0,&,a,<,5,&,a,:=,a+1,do,begin,print(a),end,end],
-      algol_for(_F, _Program, []),
-      apply([a=2], Output, _F).
-    Output = [a=5,printout=[0,1,2,3,4]].
+% for a := 0 & a < 5 & a := a + 1 do
+% begin
+%   print(a)
+% end
+?- _Program = [begin,for,a,:=,0,&,a,<,5,&,a,:=,a+1,do,begin,print(a),end,end],
+    algol_for(_F, _Program, []),
+    apply([a=2], Output, _F).
+  Output = [a=5,printout=[0,1,2,3,4]].
 </pre>
 '''