Mocky: thanks BingoBoingo
diana_coman: asciilifeform: there was nowhere not even for 1 sec any idea of "oh noez, redo drawings", just in case it's not clear; the start is still the algebra anyway and that's the correct way of thinking about it to my mind, not any convention left or right (and in this sense, if anything, I'd rather change the shift_left/shift_right for all their being ancient and all that).
diana_coman: but exactly because they force in there "direction" when that is inconsequential
diana_coman: fwiw I start with the algebra and only then, if I need to, I will refer to - better yet, make my own - diagrams; in this case my note was simply a reminder "diagrams there do not match internals + shift_left/right convention here so do own/flip/ignore"
diana_coman: asciilifeform: the text helps esp. in conveying your intention/focus as it were; it's true that one could understand FFA just with the code but that doesn't mean that the posts don't help.
diana_coman tends to write pen on paper when figuring things out which is a pain re publishing afterwards