txt = txt.to_s
# Sanitize and empty lines process
txt = sanitize_for(txt, current_user)
txt = txt.empty_p2br
# MarkDown + Code Hightlight
txt = ::Markdown2Tags.process(txt)
txt = ::ColoredCode.with_pygments(txt)
# AutoLink
al_helper = ::AutoLink.new
txt = al_helper.auto_link(txt, sanitize: false, html: { target: :_blank, rel: :nofollow })
# Protect content of external links
txt = txt.add_nofollow_to_links if !current_user.admin?
txt = txt.wrap_nofollow_links_with_noindex
txt.strip
## Hello World
### Hello World
#### Hello World
*ITALIC*
**BOLD**
~~DELETED~~
_UNDERLINE_
==highlighted==
2<sup>(nd)<sup>
[Текст ссылки](адрес://ссылки.здесь "Заголовок ссылки")
foo_bar_baz
```python
# more python code