fix: Set changed size during iteration for WS broadcast #36
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In
_broadcast_ws_event, the code iterates overself._clientsdirectly. Sinceawait websocket.send()yields control to the event loop, it is possible for a connection to close and be removed fromself._clients(in_handle_ws) while the loop in_broadcast_ws_eventis running. This causes a RuntimeError: Set changed size during iteration.Fixes #28