$ project/README.md --max-grade 0
[exit 1]
--- stdout
project/README.md  ·  Grade 1, easy to read
  FAIL  grade 1.2 is above --max-grade 0

  No flagged sentences or words.
  mean of ARI 1.2, FK 0.6, Fog 1.8 · 2 sentences
--- stderr

