[w3c/webauthn] c880ab: non- -> non-null (#890)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: c880ab937f69bc5cad48d3dd784068f760e959b8
      https://github.com/w3c/webauthn/commit/c880ab937f69bc5cad48d3dd784068f760e959b8
  Author: =JeffH <mobileuser@kingsmountain.com>
  Date:   2018-05-01 (Tue, 01 May 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  non- -> non-null (#890)



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