minor code cleanup

diff --git a/Cython/Compiler/Optimize.py b/Cython/Compiler/Optimize.py
index 6563dfa..01be0c0 100644 (file)
--- a/Cython/Compiler/Optimize.py
+++ b/Cython/Compiler/Optimize.py
@@ -3250,9 +3250,9 @@ class ConstantFolding(Visitor.VisitorTransform, SkipDeclarations):
                 else:
                     # don't break list comprehensions
                     return Nodes.StatListNode(node.pos, stats=[])
-        # iterating over a list literal? => tuples are more efficient
-        if isinstance(sequence, ExprNodes.ListNode):
-            node.iterator.sequence = sequence.as_tuple()
+            # iterating over a list literal? => tuples are more efficient
+            if isinstance(sequence, ExprNodes.ListNode):
+                node.iterator.sequence = sequence.as_tuple()
         return node
 
     def visit_WhileStatNode(self, node):