cheat sheets.

*italic*   **bold**
_italic_   __bold__

Links and images include the text or alternate text in preceding brackets:
An [Inline URL](http://url.com/ "With a title")
A [reference to example link][id]. This would be followed later by:
[id]: http://example.com/  "Title"

Inline (titles are optional):

![an inline image](/path/img.jpg "Title")
![a referenced image][id] would be followed later by:
[id]: /url/to/img.jpg "Title"

Header 1
========
Header 2
--------
or
# Header 1 #
## Header 2 ##
(closing #'s are optional)

1.  First ordered list item
2.  Second item

*   An unordered list item.

    With multiple paragraphs.

*   Another unordered list item
    1. With a nested item below it

> Email-style angle brackets
> are used for blockquotes.

> > And, they can be nested.

> #### Headers in blockquotes
> 
> * You can quote a list.
> * Etc.

`<code>` spans are delimited by backticks.  You can include literal
backticks like `` `this` ``.

This is a normal paragraph.

    This is a preformatted code block. It must be indented
    either by at least four spaces or a tab

Three or more dashes or asterisks make a horizontal rule:
---
* * *
- - - -

Finally, end a line with two or more spaces to do a manual line break