Missing newlines between tables

[JakeWharton]

Since the Picnic tables no longer produce trailing newlines we are missing some.

Example:

STRINGS:

   old   │ new   │ diff
  ───────┼───────┼────────────
   20993 │ 20999 │ +6 (+7 -1)
  + HALTON_23_X32
  + VJJJJJJJJJJ
  + cocAspectRatio
  + lodBias
  + resourceAllocatorCacheMaxAge
  + resourceAllocatorCacheSizeMB
  + upscaling

  - VJJJJJJJJ