[SECURITY] Fedora 28 Update: python-markdown2-2.3.6-1.fc28

Markdown is a text-to-HTML filter; it translates an easy-to-read / easy-to-write structured text format into HTML. Markdown’s text format is most similar to that of plain text email, and supports features such as headers, emphasis, code blocks, blockquotes, and links. This is a fast and complete Python implementation of the Markdown spec. For information about markdown itself, see http://daringfireball.net/projects/markdown/