[w3c/webauthn] cc9436: fix comments in pre blocks and other linking error...

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: cc943646ae5e63c69907578bd5a2c2daae700ba9
      https://github.com/w3c/webauthn/commit/cc943646ae5e63c69907578bd5a2c2daae700ba9
  Author: =JeffH <Jeff.Hodges@KingsMountain.com>
  Date:   2017-11-21 (Tue, 21 Nov 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  fix comments in pre blocks and other linking errors (#697)

* remove comments from <pre> blocks

* add missing close div tag in #storeCredential

* fix warning wrt  var usage in authenticatorMakeCredential input params

* fix 'challenge' linking error