With the current state of the Devuan releases it is unclear what "stable" and "testing" refer to. The most recent Devuan release is `jessie` but using `stable` in one's APT sources will result in getting packages from Debian's current `stable` which is `stretch`. That is currently the base for Devuan's `ascii`. The idea is to completely refrain from using the non-changing release identifiers, i.e. `stable`, `testing` and `unstable`. Instead only the code names will be used.