$ code-only.md easy.txt
[exit 0]
--- stdout
easy.txt  ·  Grade 0, easy to read

  No flagged sentences or words.
  mean of ARI 0.0, FK 0.0, Fog 2.1 · 3 sentences

Checked 2 files: 1 analyzed, 1 skipped.
--- stderr
papa: skipped code-only.md: no prose found (only code or markup)
