[w3c/webauthn] defb7b: ignored extn does not return a value

  Branch: refs/heads/jeffh-fix-948-ignored-extension-no-ret-val
  Home:   https://github.com/w3c/webauthn
  Commit: defb7b1ed8324aa31b7b127e53d38a5b8e65bd4b
      https://github.com/w3c/webauthn/commit/defb7b1ed8324aa31b7b127e53d38a5b8e65bd4b
  Author: JeffH <Jeff.Hodges@PayPal.com>
  Date:   2018-06-22 (Fri, 22 Jun 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  ignored extn does not return a value



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