For some reason my
[Model View Controller](http://en.wikipedia.org/wiki/Model–view–controller) markup doesn't turn into a hyperlink on my answer. Other instances of this style of adding external links worked fine in my answer. I tried fiddling with line breaks but even when the entire content is on a single line, the hyperlink never renders.
I use the
[foo](URL) markup all the time, so I'm surprised that this specific case doesn't render as I expect.