diff --git a/pelican/__init__.py b/pelican/__init__.py
index de12917d..9d063e9d 100644
--- a/pelican/__init__.py
+++ b/pelican/__init__.py
@@ -163,7 +163,7 @@ class Pelican(object):
         # erase the directory if it is not the source and if that's
         # explicitly asked
         if (self.delete_outputdir and not
-                os.path.commonpath((self.path, 
+                os.path.commonpath((self.path,
                                     self.output_path)) != self.output_path):
             clean_output_dir(self.output_path, self.output_retention)