update copyright date

Author: Ken Kundert

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2014-2025 Kenneth S. Kundert
+Copyright (c) 2014-2026 Kenneth S. Kundert
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

doc/conf.py

@@ -48,7 +48,7 @@
 
 # General information about the project.
 project = u'inform'
-copyright = u'2017-2025, Ken Kundert'
+copyright = u'2017-2026, Ken Kundert'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the

inform/inform.py

@@ -3,8 +3,9 @@
 #
 # Utilities for communicating directly with the user.
 # Documentation can be found at inform.readthedocs.io.
-#
-# Copyright (c) 2014-2025 Kenneth S. Kundert
+
+# License {{{1
+# Copyright (c) 2014-2026 Kenneth S. Kundert
 # This software is licensed under the `MIT Licents <https://mit-license.org>`_.
 
 # Imports {{{1
@@ -1143,6 +1144,8 @@ def did_you_mean(invalid_str, valid_strs):
 
     """
     from difflib import SequenceMatcher
+    if not valid_strs:
+        return ""  # or "Ø"  # null set
     similarity = lambda x: SequenceMatcher(a=invalid_str, b=x).ratio()
     return max(valid_strs, key=similarity)
 
@@ -3813,3 +3816,5 @@ def __getattr__(self, name):
         if name.startswith('__'):
             raise AttributeError(name)
         return self.kwargs.get(name)
+
+# vim: set sw=4 sts=4 tw=80 fo=ntcqwa12 et spell: