New line characters don't seem to transform properly en route to Mastadon

[jeremyfelt]

A note like this:

A chain of dependency chain hacks
keeps the dependency chain intact.

Should ideally post to Mastadon as the same. Instead it posted as:

A chain of dependency chain hackskeeps the dependency chain intact.

Best case, the new line should survive. Second best case, a space should be injected.

I've lost track over whether this text processing is in this repo or another one, but it will remind me one day either way.