This test checks special characters processing inside URLs: parenthesis and brackets should be escaped to keep markdown image and anchor syntax safe and sound.
- Some MSDN link using parenthesis
- [Google search result URL with unescaped brackets](https://www.google.ru/search?q=\[brackets are cool])
- Yet another test for [brackets], {curly braces} and (parenthesis) processing inside the anchor
And here are images with tricky attribute values: