diff --git a/report_xlsx_helper/report/report_xlsx_abstract.py b/report_xlsx_helper/report/report_xlsx_abstract.py
index 0f55612a..8c007ff7 100644
--- a/report_xlsx_helper/report/report_xlsx_abstract.py
+++ b/report_xlsx_helper/report/report_xlsx_abstract.py
@@ -505,7 +505,7 @@ class ReportXlsxAbstract(models.AbstractModel):
                         cell_type = 'datetime'
                     elif isinstance(cell_value, date):
                         cell_value = datetime.combine(
-                            cell_value, datetime.min.time()) 
+                            cell_value, datetime.min.time())
                         cell_type = 'datetime'
                     else:
                         if not cell_value:
diff --git a/report_xlsx_helper_demo/report/partner_export_xlsx.py b/report_xlsx_helper_demo/report/partner_export_xlsx.py
index 3ea0c813..c9cd55ab 100644
--- a/report_xlsx_helper_demo/report/partner_export_xlsx.py
+++ b/report_xlsx_helper_demo/report/partner_export_xlsx.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright 2009-2018 Noviat.
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).