[PATCH] Python 3.6 invalid escape sequence deprecation fixes

[Ville Skyttä <ville.skytta@iki.fi>]

https://docs.python.org/3/whatsnew/3.6.html#deprecated-python-behavior
---
 distro_tracker/core/utils/email_messages.py      | 2 +-
 distro_tracker/mail/control/commands/keywords.py | 4 ++--
 distro_tracker/project/urls.py                   | 2 +-
 setup.py                                         | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/distro_tracker/core/utils/email_messages.py b/distro_tracker/core/utils/email_messages.py
index d7d370e..db73758 100644
--- a/distro_tracker/core/utils/email_messages.py
+++ b/distro_tracker/core/utils/email_messages.py
@@ -65,7 +65,7 @@ def names_and_addresses_from_string(content):
     """
     all_parts = [
         name_and_address_from_string(part)
-        for part in re.split('(?<=>)\s*,\s*', content)
+        for part in re.split(r'(?<=>)\s*,\s*', content)
     ]
     return [
         part
diff --git a/distro_tracker/mail/control/commands/keywords.py b/distro_tracker/mail/control/commands/keywords.py
index 12a1a13..10ffd4f 100644
--- a/distro_tracker/mail/control/commands/keywords.py
+++ b/distro_tracker/mail/control/commands/keywords.py
@@ -277,7 +277,7 @@ class SetDefaultKeywordsCommand(Command, KeywordCommandMixin):
             self.keywords)
 
     def handle(self):
-        keywords = re.split('[,\s]+', self.keywords)
+        keywords = re.split(r'[,\s]+', self.keywords)
         user_email, _ = UserEmail.objects.get_or_create(email=self.email)
         email_settings, _ = \
             EmailSettings.objects.get_or_create(user_email=user_email)
@@ -333,7 +333,7 @@ class SetPackageKeywordsCommand(Command, KeywordCommandMixin):
         Actual implementation of the keyword command version which handles
         subscription specific keywords.
         """
-        keywords = re.split('[,\s]+', self.keywords)
+        keywords = re.split(r'[,\s]+', self.keywords)
         subscription = self.get_subscription(self.email, self.package)
         if not subscription:
             return
diff --git a/distro_tracker/project/urls.py b/distro_tracker/project/urls.py
index 5a5b091..2b69f4c 100644
--- a/distro_tracker/project/urls.py
+++ b/distro_tracker/project/urls.py
@@ -78,7 +78,7 @@ urlpatterns = [
 
     # Permanent redirect for the old RSS URL
     url(r'^(?P<package_hash>(lib)?.)/(?P<package_name>(\1).+)'
-        '/news\.rss20\.xml$',
+        r'/news\.rss20\.xml$',
         legacy_rss_redirect),
 
     url(r'^search$', PackageSearchView.as_view(),
diff --git a/setup.py b/setup.py
index 9277b53..8282f04 100755
--- a/setup.py
+++ b/setup.py
@@ -34,7 +34,7 @@ def find_package_data(basedir):
 
 
 with open('debian/changelog') as f:
-    res = re.search('\((\d.*)\)', f.readline())
+    res = re.search(r'\((\d.*)\)', f.readline())
     version = res.group(1)
 
 setup(name='DistroTracker',
-- 
2.14.1