[v2] Fix autoformatting issues

[zkat]

it's just completely borked right now.

• Values shouldn't be formatted unless their repr is explicitly removed/missing. Autoformat is primarily for layout, and shouldn't affect the data representation. Perhaps there can be an option later to autoformat values, but that would need to be repr-aware.
• Single-line comments are randomly going missing during autoformat?
• There's what seems to be a weird interaction between /- and // comments. There's double newlines or something?
• esclines aren't being collapsed/removed
• There's a random leading space being added to trailing // comments when they're on their own line?