Tarrasch/yesod-text-markdown — pull request #8 by MaxGabriel (2014-10-10 22:16:41+00:00)
Title: Set the `required` attribute on the textarea if applicable

Using this code as a template: https://github.com/yesodweb/yesod/blob/master/yesod-form/Yesod/Form/Fields.hs#L167