[<][<=][=>]GFM extensions to CommonMark

GFM extensions to CommonMark
    Tables
    Checklists
    Strikethrought
    Autolinks
    Disable HTML tags
    Footnotes (no GFM standard)
    Syntax highlighting
    YAML Metadata (unsupported)
    Emojis (unsupported)
    generated footnotes:

[<][<=][=>][*]

---

Syntax highlighting

require 'redcarpet'
markdown = Redcarpet.new("¡Hola Mundo!")
puts markdown.to_html

<blockquote>
  See you!
  </blockquote>

if (not defined $script_subdir) { $script_subdir=""; }
$valor{USUGRU}=$usugru;