It reformats this for no reason

[nickretallack]

Input:

// @flow
const f = x => ({a: 'a', b: 'b'}[x]);

Output:

const f = (x) =>
  ({
    a: 'a',
    b: 'b',
  }[x]);

With --no-prettier:

const f = x => ({
  a: 'a',
  b: 'b'
})[x];

It could have left that line alone.

[zxbodya]

I suspect the issue is that recast reformats the code, and then prettier preserves the formatting. Will look into but likely there is no easy fix…

[nickretallack]

The question though is why does recast bother changing the code? The AST is identical, isn't it?