Document `BaseHTTPMiddleware` bugs (#1640)
Document `BaseHTTPMiddleware` bugs (#1640)

* Document `BaseHTTPMiddleware` bugs

* Apply suggestions from code review

Co-authored-by: Adrian Garcia Badaracco <e27daa303f2cab77ffec56a54997f382ae605c48@users.noreply.github.com>

Co-authored-by: Adrian Garcia Badaracco <e27daa303f2cab77ffec56a54997f382ae605c48@users.noreply.github.com>
encode/starlette,encode/starlette