       ...>     Inspect.Algebra.concat(
       ...>       "Hughes",
       ...>       Inspect.Algebra.line()
-      ...>     ), "Wadler"
+      ...>     ),
+      ...>     "Wadler"
       ...>   )
       iex> Inspect.Algebra.format(doc, 80)
       ["Hughes", "\n", "Wadler"]


  ## Examples

      iex> doc = Inspect.Algebra.group(
      ...>   Inspect.Algebra.concat(
      ...>     Inspect.Algebra.group(
      ...>       Inspect.Algebra.concat(
      ...>         "Hello,",
      ...>         Inspect.Algebra.concat(
      ...>           Inspect.Algebra.break,
      ...>           "A"
      ...>         )
      ...>       )
      ...>     ),
      ...>     Inspect.Algebra.concat(
      ...>       Inspect.Algebra.break,
      ...>       "B"
      ...>     )
      ...> ))
      iex> Inspect.Algebra.format(doc, 80)
      ["Hello,", " ", "A", " ", "B"]
      iex> Inspect.Algebra.format(doc, 6)

  ## Examples

      iex> docs = ["A", "B", "C"]
      iex> docs =
      ...>   Inspect.Algebra.fold_doc(docs, fn doc, acc ->
      ...>     Inspect.Algebra.concat([doc, "!", acc])
      ...>   end)
      iex> Inspect.Algebra.format(docs, 80)
      ["A", "!", "B", "!", "C"]

