Syntax error

rocketbot/cogs/logcog.py

 				if role not in before.roles:
 					added_role_names.append(role.name)
 			if len(removed_role_names) > 0:
-				changes.append(f'Removed roles: ~~**{"**~~, ~~**".joined(removed_role_names)}**~~')
+				changes.append(f'Removed roles: ~~**{"**~~, ~~**".join(removed_role_names)}**~~')
 			if len(added_role_names) > 0:
-				changes.append(f'Added roles: **{"**, **".joined(added_role_names)}**')
+				changes.append(f'Added roles: **{"**, **".join(added_role_names)}**')
 		if after.pending != before.pending:
 			pass  # not that interesting and probably noisy
 		if after.timed_out_until != before.timed_out_until: