Just to contribute some ideas, some time ago I implemented macro-based "power asserts" for Groovy and Scala, and people really seem to love them. (See https://github.com/pniederw/expecty#code-examples for some example output of the Scala variant. The Groovy variant produces similar output, and is built into the language's `assert` statement.) Maybe Julia could offer something similar?
Cheers, Peter PS: Great language, by the way. I'm not into technical computing, but I admire Julia's feature set (e.g. multiple dispatch with extensible functions feels so right), and how well it copes without hardwiring features into the language. I'm convinced that this kind of expressiveness is invaluable for "business computing" as well.
