The formatter wins, and the board still looks like a board

15 of 27 modules failed `gleam format --check`, and the reason mattered: the
packings in `families.gleam` were written as pictures of the board, and the
formatter reflows a list of integers to fill the width. Conforming meant losing
the one place where the source shows you the thing it describes.

It does not reflow a list whose elements are themselves lists. So a packing is
now a list of rows, each cell a one-letter constant — `e` empty, `s` single,
`u` upright, `r` recumbent, `g` goal, which are the shape codes `domain` already
encodes with, not a private numbering. Every cell is one character wide, so the
columns line up; the rows survive the formatter because of their structure
rather than in spite of it. `families.grid` flattens at the point of use, which
is where everything downstream wanted it flat anyway.

All nine packings were checked cell by cell against the previous revision and
are identical, and each is exactly width times height cells.

The rest is the formatter run over `src` and `test`. One real loss: it strips
trailing zeros, so the weight column in `difficulty.gleam` reads 0.15, 0.4, 0.6,
0.1 and can no longer be aligned on the decimal point. Not worth the exemption,
and there is no exemption to take.

commit

619a0c3c7682e51c4f04586b984216d626ecba16

parent

0c29377f001337d49c64f04831abb93387bd840a

author

Dami <dami.etoile@gmail.com>