The data/.ts refactor left a few .js files in, which weren't deleted
between 13 and 3 days ago:
c85f5bccb0
Because of this, the corresponding `.ts` files were considered new,
rather than renamed, and changes to the `.js` files got deleted rather
than merged.
Fortunately, this only affected `moves.js`, which has now been manually
re-merged with the changes.