1 files changed, 20 insertions, 20 deletions
diff --git a/prolog/problems/denotational_semantics/algol_3/en.py b/prolog/problems/denotational_semantics/algol_3/en.py
index c5da13e..59a9bd2 100644
--- a/prolog/problems/denotational_semantics/algol_3/en.py
+++ b/prolog/problems/denotational_semantics/algol_3/en.py
@@ -6,28 +6,28 @@ slug = 'interpreter for mini-algol'
 description = '''\
 <p>A DCG for mini-algol.</p>
 <pre>
-  % apply a function to a starting state
-  ?- apply([a=2], Out, fun(_In, Out, eval(a+3, _In, Out))).
-    Out = 5.
+% apply a function to a starting state
+?- apply([a=2], Out, fun(_In, Out, eval(a+3, _In, Out))).
+  Out = 5.
 
-  % a := a+b
-  % b := a-b
-  % a := a-b
-  ?- _Program = [begin,a,:=,a+b,b,:=,a-b,a,:=,a-b,end],
-      algol(_F, _Program, []),
-      apply([a=3,b=5], Output, _F).
-    Output = [a=5,b=3,printout=[]].
+% a := a+b
+% b := a-b
+% a := a-b
+?- _Program = [begin,a,:=,a+b,b,:=,a-b,a,:=,a-b,end],
+    algol(_F, _Program, []),
+    apply([a=3,b=5], Output, _F).
+  Output = [a=5,b=3,printout=[]].
 
-  % a := 0
-  % while a < 10 do
-  % begin
-  %   print(a)
-  %   a := a+1
-  % end
-  ?- _Program = [begin,a,:=,0,while,a,<,10,do,begin,print(a),a,:=,a+1,end,end],
-      algol(_F, _Program, []),
-      apply([a=3], Output, _F).
-    Output = [a=10,printout=[0,1,2,3,4,5,6,7,8,9]].
+% a := 0
+% while a < 10 do
+% begin
+%   print(a)
+%   a := a+1
+% end
+?- _Program = [begin,a,:=,0,while,a,<,10,do,begin,print(a),a,:=,a+1,end,end],
+    algol(_F, _Program, []),
+    apply([a=3], Output, _F).
+  Output = [a=10,printout=[0,1,2,3,4,5,6,7,8,9]].
 </pre>
 '''