At some point in the past did Smoothieware treat % as a line comment?

At some point in the past did Smoothieware treat % as a line comment? I ran across a Fusion 360 CAM post processor which I assume worked at some point, but now fails over lines which just contain a %. I’m hacking the previous post processor to get it to work with my K40 with Smoothieboard so I can use Fusion 360 with it.

% has never been used as a comment in smoothie.

Freaky, the post processor I started from claims to have even been updated to support the laser CAM operations, but it has two lines with %'s. Can’t imagine what the story is behind that.