Browser REPL webserver incorrectly parses request path

The browser REPL static content server returns a 404 whenever you submit a request with a query string. For example:

will trigger a 404 when this namespace is loaded.

The preferred behavior is that the query string would be ignored and the requested file would be served.

While this might seem like a cosmetic issue, this gets in the way of things like cache busting URLs, which is required to get source maps to reload in Chrome.