+ var emitter: MarkdownEmitter is noinit, protected writable
+
+ # Work in extended mode (default).
+ #
+ # Behavior changes when using extended mode:
+ #
+ # * Lists and code blocks end a paragraph
+ #
+ # In normal markdown the following:
+ #
+ # This is a paragraph
+ # * and this is not a list
+ #
+ # Will produce:
+ #
+ # <p>This is a paragraph
+ # * and this is not a list</p>
+ #
+ # When using extended mode this changes to:
+ #
+ # <p>This is a paragraph</p>
+ # <ul>
+ # <li>and this is not a list</li>
+ # </ul>
+ #
+ # * Fences code blocks
+ #
+ # If you don't want to indent your all your code with 4 spaces,
+ # you can wrap your code in ``` ``` ``` or `~~~`.
+ #
+ # Here's an example:
+ #
+ # ```
+ # fun test do
+ # print "Hello World!"
+ # end
+ # ```
+ #
+ # * Code blocks meta
+ #
+ # If you want to use syntax highlighting tools, most of them need to know what kind
+ # of language they are highlighting.
+ # You can add an optional language identifier after the fence declaration to output
+ # it in the HTML render.
+ #
+ # ```nit
+ # import markdown
+ #
+ # print "# Hello World!".md_to_html
+ # ```
+ #
+ # Becomes
+ #
+ # <pre class="nit"><code>import markdown
+ #
+ # print "Hello World!".md_to_html
+ # </code></pre>
+ #
+ # * Underscores (Emphasis)
+ #
+ # Underscores in the middle of a word like:
+ #
+ # Con_cat_this
+ #
+ # normally produces this:
+ #
+ # <p>Con<em>cat</em>this</p>
+ #
+ # With extended mode they don't result in emphasis.
+ #
+ # <p>Con_cat_this</p>
+ #
+ # * Strikethrough
+ #
+ # Like in [GFM](https://help.github.com/articles/github-flavored-markdown),
+ # strikethrought span is marked with `~~`.
+ #
+ # ~~Mistaken text.~~
+ #
+ # becomes
+ #
+ # <del>Mistaken text.</del>
+ var ext_mode = true