Remove space-padding from <pre> blocks

1 files changed, 9 insertions, 9 deletions

diff --git a/prolog/problems/sets/subset_2/en.py b/prolog/problems/sets/subset_2/en.py
index eb96ac0..e31b60f 100644
--- a/prolog/problems/sets/subset_2/en.py
+++ b/prolog/problems/sets/subset_2/en.py
@@ -6,15 +6,15 @@ slug = 'generate all subsets of a set'
 description = '''\
 <p><code>subset(Set, Subset)</code>: the set <code>Subset</code> is a subset of <code>Set</code>. This predicate should generate all valid solutions, one by one.</p>
 <pre>
-  ?- subset([1,2,3], SS).
-    SS = [1,2,3] ;
-    SS = [1,2] ;
-    SS = [1,3] ;
-    SS = [1] ;
-    SS = [2,3] ;
-    SS = [2] ;
-    SS = [3] ;
-    SS = [].
+?- subset([1,2,3], SS).
+  SS = [1,2,3] ;
+  SS = [1,2] ;
+  SS = [1,3] ;
+  SS = [1] ;
+  SS = [2,3] ;
+  SS = [2] ;
+  SS = [3] ;
+  SS = [].
 </pre>'''
 
 hint = {}