From 8119b679eb85cdc0ae3d321e54d06dd0200a1e82 Mon Sep 17 00:00:00 2001
From: Tim Graham <timograham@gmail.com>
Date: Fri, 16 Sep 2016 12:15:00 -0400
Subject: Refs #27025 -- Fixed "invalid escape sequence" warnings in Python
 3.6.

http://bugs.python.org/issue27364
---
 django/utils/html.py                 | 2 +-
 django/utils/regex_helper.py         | 4 ++--
 django/utils/text.py                 | 8 ++++----
 django/utils/translation/__init__.py | 2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

(limited to 'django/utils')

diff --git a/django/utils/html.py b/django/utils/html.py
index a5cb56ec9e..84379caa9c 100644
--- a/django/utils/html.py
+++ b/django/utils/html.py
@@ -36,7 +36,7 @@ simple_email_re = re.compile(r'^\S+@\S+\.\S+$')
 link_target_attribute_re = re.compile(r'(<a [^>]*?)target=[^\s>]+')
 html_gunk_re = re.compile(
     r'(?:<br clear="all">|<i><\/i>|<b><\/b>|<em><\/em>|<strong><\/strong>|'
-    '<\/?smallcaps>|<\/?uppercase>)', re.IGNORECASE)
+    r'<\/?smallcaps>|<\/?uppercase>)', re.IGNORECASE)
 hard_coded_bullets_re = re.compile(
     r'((?:<p>(?:%s).*?[a-zA-Z].*?</p>\s*)+)' % '|'.join(re.escape(x) for x in DOTS), re.DOTALL
 )
diff --git a/django/utils/regex_helper.py b/django/utils/regex_helper.py
index 4a697b2920..622d822759 100644
--- a/django/utils/regex_helper.py
+++ b/django/utils/regex_helper.py
@@ -48,7 +48,7 @@ class NonCapture(list):
 
 
 def normalize(pattern):
-    """
+    r"""
     Given a reg-exp pattern, normalizes it to an iterable of forms that
     suffice for reverse matching. This does the following:
 
@@ -203,7 +203,7 @@ def normalize(pattern):
 
 
 def next_char(input_iter):
-    """
+    r"""
     An iterator that yields the next character from "pattern_iter", respecting
     escape sequences. An escaped character is replaced by a representative of
     its class (e.g. \w -> "x"). If the escaped character is one that is
diff --git a/django/utils/text.py b/django/utils/text.py
index 3b8fc581bf..a77f27eed7 100644
--- a/django/utils/text.py
+++ b/django/utils/text.py
@@ -423,11 +423,11 @@ def slugify(value, allow_unicode=False):
     value = force_text(value)
     if allow_unicode:
         value = unicodedata.normalize('NFKC', value)
-        value = re.sub('[^\w\s-]', '', value, flags=re.U).strip().lower()
-        return mark_safe(re.sub('[-\s]+', '-', value, flags=re.U))
+        value = re.sub(r'[^\w\s-]', '', value, flags=re.U).strip().lower()
+        return mark_safe(re.sub(r'[-\s]+', '-', value, flags=re.U))
     value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore').decode('ascii')
-    value = re.sub('[^\w\s-]', '', value).strip().lower()
-    return mark_safe(re.sub('[-\s]+', '-', value))
+    value = re.sub(r'[^\w\s-]', '', value).strip().lower()
+    return mark_safe(re.sub(r'[-\s]+', '-', value))
 
 
 def camel_case_to_spaces(value):
diff --git a/django/utils/translation/__init__.py b/django/utils/translation/__init__.py
index 9154ceeb7b..a5975b005c 100644
--- a/django/utils/translation/__init__.py
+++ b/django/utils/translation/__init__.py
@@ -255,7 +255,7 @@ def get_language_info(lang_code):
         info['name_translated'] = ugettext_lazy(info['name'])
     return info
 
-trim_whitespace_re = re.compile('\s*\n\s*')
+trim_whitespace_re = re.compile(r'\s*\n\s*')
 
 
 def trim_whitespace(s):
-- 
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