Once I used a really REALLY good formatter like prettier for JS or elm-format for elm I got it. I realized that I don't care about the format, I care to see the

Once I used a really REALLY good formatter like prettier for JS or elm-format for elm I got it. I realized that I don't care about the format, I care to see the jump from unformatted to formatted that means what I wrote is valid syntax. The leading commas (a convention but not actually necessary for elm) make diffs easy and make lists a bit easier to read. The syntax is almost the same in Haskell, but Ormolu puts the commas at the end and somehow it's harder to pick apart complicated list entries. Can't really explain why.