Reduce unnecessary whitespace in JSON. (#7372)

changelog.d/7372.misc

synapse/http/server.py

synapse/replication/tcp/commands.py

synapse/rest/media/v1/preview_url_resource.py

synapse/storage/databases/main/account_data.py

synapse/storage/databases/main/deviceinbox.py

synapse/storage/databases/main/devices.py

synapse/storage/databases/main/e2e_room_keys.py

synapse/storage/databases/main/end_to_end_keys.py

synapse/storage/databases/main/event_push_actions.py

synapse/storage/databases/main/group_server.py

synapse/storage/databases/main/push_rule.py

synapse/storage/databases/main/receipts.py

synapse/util/__init__.py

synapse/util/frozenutils.py