diff --git a/media/forms.py b/media/forms.py
index 9aaf0bf..926a485 100644
--- a/media/forms.py
+++ b/media/forms.py
@@ -4,8 +4,8 @@
 
 import json
 import re
-import urllib.request
 import unicodedata
+import urllib.request
 
 from django.forms import ModelForm
 
@@ -103,16 +103,18 @@ class MediaAdminForm(ModelForm):
                     self.download_data_openlibrary(isbn)
 
                 if self.cleaned_data['title']:
-                    self.cleaned_data['title'] = re.sub('\(AUT\) ',
-                                        '', self.cleaned_data['title'])
+                    self.cleaned_data['title'] = re.sub(r'\(AUT\) ',
+                                                        '', self.cleaned_data['title'])
 
                 if self.cleaned_data['authors']:
                     authors = self.cleaned_data['authors']
                     old_authors = authors.copy()
+
                     def sort(author):
                         return str(-author.note) + "." \
                                + str(old_authors.index(author)) \
                                + "." + author.name
+
                     authors.sort(key=sort)
                     author_name = self.cleaned_data['authors'][0].name
                     if ',' not in author_name and ' ' in author_name:
@@ -130,9 +132,9 @@ class MediaAdminForm(ModelForm):
 
                     if self.cleaned_data['subtitle']:
                         self.cleaned_data['subtitle'] = re.sub(r'</span>',
-                                '', self.cleaned_data['subtitle'])
+                                                               '', self.cleaned_data['subtitle'])
                         self.cleaned_data['subtitle'] = re.sub(r'<span.*>',
-                                '', self.cleaned_data['subtitle'])
+                                                               '', self.cleaned_data['subtitle'])
                         start = self.cleaned_data['subtitle'].split(' ')[0] \
                             .replace('.', '')