Failure @19 (⟨1, 19⟩): expected link target '(url)' or '[ref]' (use '\[' for a literal '[')
Final stack:
  (Lean.Doc.Syntax.image
   "!["
   (str "\"alt text is good\"")
   "]"
   (Lean.Doc.Syntax.url <missing>))
Remaining: "](logo.png)"