Fix indentation error in barcode handling else block

pdf_comparator.py

@@ -292,7 +292,7 @@ def compare_pdfs(file_a, file_b):
         if HAS_BARCODE:
             bar_a, info_a = find_barcode_boxes_and_info(a)
             bar_b, info_b = find_barcode_boxes_and_info(b)
-                    else:
+        else:
             bar_a, info_a = [], []
             bar_b, info_b = [], []