Yuji Yamamoto authored Oct 25, 2018 and Ben Gamari committed Oct 29, 2018

- Although the sample is for `-fprint-explicit-kinds`, the sample code
  uses `-fprint-explicit-foralls` (but perhaps the output used to be
  correct one of `-fprint-explicit-kinds`).
- Update the output with the recent version of GHC (ver. 8.4.3. I guess
  it doesn't change in GHC 8.6...)
- Add more samples to clarify the difference of kinds, which tells
  effect of `-fprint-explicit-kinds` more clearly.