Empty source re-render Hotfix

[urffsamhunt]

Using an empty comment for Javascript and Python, and placeholder empty main functions for Rust and Vala seems to work for Issue #873

[sonnyp]

Thanks, unfortunately this isn't the right solution.

It feels more like a workaround. "If it doesn't work without code then I'll put code" but the issue essentially says "it should work when there is no code".

It's not an easy problem to tackle, I suggest contributing to demos to get started