#422 Update rxmarkdown

        ButterKnife.bind(this, getView());

        String content = note.getContent();

        /*

         * The following replaceAll adds links ()[] to all URLs that are not in an existing link.

         * This regular expression consists of three parts:

         * 1. (?<![(])

         *    negative look-behind: no opening bracket "(" directly before the URL

         *    This prevents replacement in target part of Markdown link: [](URL)

         * 2. (https?://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|])

         *    URL pattern: matches all addresses beginning with http:// or https://

         * 3. (?![^\\[]*\\])

         *    negative look-ahead: no closing bracket "]" after the URL (otherwise there have to be an opening bracket "[" before)

         *    This prevents replacement in label part of Markdown link: [...URL...]()

         */

        content = content.replaceAll("(?<![(])(https?://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|])(?![^\\[]*\\])", "[$1]($1)");

        RxMarkdown.with(content, getActivity())

                .config(