Conditions in loops processed as AssignmentExpression, should be Expression

@Robin I'm sorry, I misunderstood you! But it's genuinely a place where control constructs are required, since the double loop that wants to terminate early is working on a significant amount of lexically visible state. Of course this can can be skinned in many different ways, I can't look at the design of JS and not think that its own (very different from C) labels were put there for precisely this use case, and they involve a lot less clutter (both visual and conceptual) than any of the many ways of reifying the loop.

@Gordon It's new code, so I'm able to work around the limitations, but it's real code, not a test suite. I have a number of watch faces and related features that I'm working on in the emulator in anticipation of receiving my Bangle 2. When I have real hardware to try them on I'll likely upload some or all of them.