alphagov/stagecraft — pull request #220 by alexmuller (2014-09-15 08:25:15+00:00)
Title: Always return a string in the 'message' field

Other errors return a formatted string from the message field. A dashboard failing validation should follow this pattern so that API clients can simply output the string rather than processing it.

See alphagov/performanceplatform-admin#53 for more details.