non-idempotent comment position before await statement inside try block

Prettier 2.1.2
Input Playground Link
Rerun on Output Playground Link

Note:

Using /* this type of comment */ works around the issue.

Input:

async function promptForSetUpSkeleton(): Promise<SkeletonAnswers> {
  let defaultAuthor
  try {
    defaultAuthor = ( // $FlowFixMe
      await spawn('git', ['config', 'user.name'], {
        maxBuffer: 1024,
      })
    ).stdout
      .toString('utf8')
      .trim()
  } catch (error) {
    // ignore
  }
}

Output:

async function promptForSetUpSkeleton(): Promise<SkeletonAnswers> {
  let defaultAuthor;
  try {
    defaultAuthor = // $FlowFixMe
    (
      await spawn("git", ["config", "user.name"], {
        maxBuffer: 1024,
      })
    ).stdout
      .toString("utf8")
      .trim();
  } catch (error) {
    // ignore
  }
}

Rerun on Output:

async function promptForSetUpSkeleton(): Promise<SkeletonAnswers> {
  let defaultAuthor;
  try {
    defaultAuthor = ( // $FlowFixMe
      await spawn("git", ["config", "user.name"], {
        maxBuffer: 1024,
      })
    ).stdout
      .toString("utf8")
      .trim();
  } catch (error) {
    // ignore
  }
}

Start by reproducing the example from the Input Playground Link and compare the first formatting result with the Rerun on Output Playground Link. Trace the formatter entry point for this JavaScript/TypeScript case; done means formatting is idempotent and preserves the comment position around the await statement.