> Opening a file is often done in creation, and `file:5` is a perfectly valid filename, so it's a bit debatable for a default. It gets even more fun on Windows

> Opening a file is often done in creation, and `file:5` is a perfectly valid filename, so it's a bit debatable for a default. It gets even more fun on Windows! Giving a filename of `foo:5` can result in a file called `foo` with an alternate datastream called `5`.