Regex string escape properly

readthedocs/projects/constants.py

@@ -314,24 +314,24 @@ PROGRAMMING_LANGUAGES = (
 
 LOG_TEMPLATE = '(Build) [{project}:{version}] {msg}'
 
-PROJECT_PK_REGEX = '(?:[-\w]+)'
-PROJECT_SLUG_REGEX = '(?:[-\w]+)'
+PROJECT_PK_REGEX = r'(?:[-\w]+)'
+PROJECT_SLUG_REGEX = r'(?:[-\w]+)'
 
 GITHUB_REGEXS = [
-    re.compile('github.com/(.+)/(.+)(?:\.git){1}$'),
-    re.compile('github.com/(.+)/(.+)'),
-    re.compile('github.com:(.+)/(.+)\.git$'),
+    re.compile(r'github.com/(.+)/(.+)(?:\.git){1}$'),
+    re.compile(r'github.com/(.+)/(.+)'),
+    re.compile(r'github.com:(.+)/(.+)\.git$'),
 ]
 BITBUCKET_REGEXS = [
-    re.compile('bitbucket.org/(.+)/(.+)\.git$'),
-    re.compile('@bitbucket.org/(.+)/(.+)\.git$'),
-    re.compile('bitbucket.org/(.+)/(.+)/?'),
-    re.compile('bitbucket.org:(.+)/(.+)\.git$'),
+    re.compile(r'bitbucket.org/(.+)/(.+)\.git$'),
+    re.compile(r'@bitbucket.org/(.+)/(.+)\.git$'),
+    re.compile(r'bitbucket.org/(.+)/(.+)/?'),
+    re.compile(r'bitbucket.org:(.+)/(.+)\.git$'),
 ]
 GITLAB_REGEXS = [
-    re.compile('gitlab.com/(.+)/(.+)(?:\.git){1}$'),
-    re.compile('gitlab.com/(.+)/(.+)'),
-    re.compile('gitlab.com:(.+)/(.+)\.git$'),
+    re.compile(r'gitlab.com/(.+)/(.+)(?:\.git){1}$'),
+    re.compile(r'gitlab.com/(.+)/(.+)'),
+    re.compile(r'gitlab.com:(.+)/(.+)\.git$'),
 ]
 GITHUB_URL = (
     'https://github.com/{user}/{repo}/'

readthedocs/search/utils.py

@@ -103,7 +103,7 @@ def parse_path_from_file(file_path):
     #   "path/index.html" => "path/index"
     #   "/path/index" => "path/index"
     path = re.sub('/$', '/index', path)
-    path = re.sub('\.html$', '', path)
+    path = re.sub(r'\.html$', '', path)
     path = re.sub('^/', '', path)
 
     return path

readthedocs/settings/base.py

@@ -296,8 +296,8 @@ class CommunityBaseSettings(Settings):
 
     # CORS
     CORS_ORIGIN_REGEX_WHITELIST = (
-        '^http://(.+)\.readthedocs\.io$',
-        '^https://(.+)\.readthedocs\.io$'
+        r'^http://(.+)\.readthedocs\.io$',
+        r'^https://(.+)\.readthedocs\.io$',
     )
     # So people can post to their accounts
     CORS_ALLOW_CREDENTIALS = True