From dc57266ca12662cad738509b070af0e8cf18532b Mon Sep 17 00:00:00 2001
From: Nicco Kunzmann <niccokunzmann@rambler.ru>
Date: Wed, 1 Nov 2023 03:17:37 +0000
Subject: [PATCH] Restore == and not != equivalence

---
 src/icalendar/caselessdict.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/icalendar/caselessdict.py b/src/icalendar/caselessdict.py
index c367145..097dcd9 100644
--- a/src/icalendar/caselessdict.py
+++ b/src/icalendar/caselessdict.py
@@ -88,6 +88,9 @@ class CaselessDict(OrderedDict):
     def __eq__(self, other):
         return self is other or dict(self.items()) == dict(other.items())
 
+    def __ne__(self, other):
+        return not self == other
+
     # A list of keys that must appear first in sorted_keys and sorted_items;
     # must be uppercase.
     canonical_order = None