diff --git a/moulinette/utils/filesystem.py b/moulinette/utils/filesystem.py
index 737bdd18..bbea872c 100644
--- a/moulinette/utils/filesystem.py
+++ b/moulinette/utils/filesystem.py
@@ -9,6 +9,7 @@ from moulinette.core import MoulinetteError
 
 # Files & directories --------------------------------------------------
 
+
 def read_file(file_path):
     """
     Read a regular text file
@@ -94,6 +95,7 @@ def write_to_file(file_path, data, file_mode="w"):
                               m18n.g('error_writing_file',
                                      file=file_path, error=str(e)))
 
+
 def append_to_file(file_path, data):
     """
     Append a single string or a list of string to a text file.
diff --git a/moulinette/utils/process.py b/moulinette/utils/process.py
index 6475f056..e48f27a9 100644
--- a/moulinette/utils/process.py
+++ b/moulinette/utils/process.py
@@ -106,7 +106,7 @@ def call_async_output(args, callback, **kwargs):
 # Call multiple commands -----------------------------------------------
 
 def run_commands(cmds, callback=None, separate_stderr=False, shell=True,
-                  **kwargs):
+                 **kwargs):
     """Run multiple commands with error management
 
     Run a list of commands and allow to manage how to treat errors either