Description: Fix python SyntaxWarning with regular expression
Author: Angel Abad <angel@debian.org>
Bug-Debian: https://bugs.debian.org/1085613
Forwarded: no
Last-Update: 2025-10-05

--- a/glue/core.py
+++ b/glue/core.py
@@ -257,7 +257,7 @@
         algorithm. The default is 'maxside'.
         """
         extensions = '|'.join(self.valid_extensions)
-        extension_re = re.compile('.+\.(%s)$' % extensions, re.IGNORECASE)
+        extension_re = re.compile(r'.+\.(%s)$' % extensions, re.IGNORECASE)
         files = sorted(os.listdir(self.path))
 
         images = []
