Unstable comments in interfaces

[SimenB]

Prettier 1.16.4
Playground link

--parser typescript

Input:

interface Jest {
  advanceTimersByTime(msToRun: number): void;    /**
  */
}

interface Jest {
  advanceTimersByTime(msToRun: number): void
  /**
   */;
}

interface Jest {
  advanceTimersByTime(
    msToRun: number
  ): void;
  /**
   */
}

Output:

interface Jest {
  advanceTimersByTime(msToRun: number): void
  /**
   */;
}

interface Jest {
  advanceTimersByTime(
    msToRun: number
  ): void;
  /**
   */
}

interface Jest {
  advanceTimersByTime(msToRun: number): void;
  /**
   */
}

Expected behavior:
For the last state to happen after a single format, not after 3. Note that this affects both Flow and TypeScript parsers - although middle state only happens with typescript. Using Babel parser works correctly after a single format