Allow = in mxids and groupids

... because the spec says we should.

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/groups/groups_server.py b/synapse/groups/groups_server.py

index c359bfa72b..3599bfe9cf 100644
--- a/synapse/groups/groups_server.py
+++ b/synapse/groups/groups_server.py
@@ -794,5 +794,5 @@ def _validate_group_id(group_id):
     if types.contains_invalid_mxid_characters(localpart):
         raise SynapseError(
             400,
-            "Group ID can only contain characters a-z, 0-9, or '_-./'",
+            "Group ID can only contain characters a-z, 0-9, or '=_-./'",
         )