Render Single-Line Markdown Text with Redcarpet

We love Markdown. We use it wherever we can for text formatting. In a web app, the obvious place for it is in large text areas, where we can allow complete freedom of formatting. Headers, paragraphs, lists, it’s all good.

What about the formatting of text in single-line text fields? If our form entry is a single line, that’s usually how its text will be displayed in our interface. In this case, we probably want to avoid all the block-level elements that Markdown will let the user create.