Visual centering

[milesagraham]

updated tests to be compatible with latest changes

[alisterburt]

@milesagraham cool to see you working on this! Would it be better to make the center configurable with x/y/z values as a Tuple[int, int, int]?

[milesagraham]

Hey Alister,

Yeah good to be working on it :D Day 1 of 3rd year begun!

Absolutely. This is my next step. Was thinking along the lines (after a useful convo with @jojoelfe) of the --centering option being either "standard" (i.e. change nothing), "visual" (shifting -0.5 if the box is even to make it 'look' nice, maybe not so valuable for most cases), or "custom" with the option to specify values exactly as you suggest. This is next on my list!

#48
#46

Thanks for the feedback! All thoughts welcomed / are useful to consider if you disagree with this idea. (Am anticipating difficulties getting typer to like it, for example)