diff --git a/report_xlsx_helper/readme/CONTRIBUTORS.rst b/report_xlsx_helper/readme/CONTRIBUTORS.rst
index dbf4d75b..9df1ce27 100644
--- a/report_xlsx_helper/readme/CONTRIBUTORS.rst
+++ b/report_xlsx_helper/readme/CONTRIBUTORS.rst
@@ -1,4 +1,3 @@
 * Luc De Meyer <luc.demeyer@noviat.com>
 * Rattapong Chokmasermkul <rattapongc@ecosoft.co.th>
 * Saran Lim. <saranl@ecosoft.co.th>
-
diff --git a/report_xlsx_helper/report/report_xlsx_abstract.py b/report_xlsx_helper/report/report_xlsx_abstract.py
index 26c7f891..479560ae 100644
--- a/report_xlsx_helper/report/report_xlsx_abstract.py
+++ b/report_xlsx_helper/report/report_xlsx_abstract.py
@@ -569,8 +569,8 @@ class ReportXlsxAbstract(models.AbstractModel):
         col_specs_section=None,
         render_space=None,
         default_format=None,
-        col_specs='col_specs',
-        wanted_list='wanted_list',
+        col_specs="col_specs",
+        wanted_list="wanted_list",
     ):
         """
         Write a line with all columns included in the 'wanted_list'.