docs/markdown.ex: do no print empty suggestions
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@ -66,6 +66,8 @@ defp print_suggestion(file, suggestion, as_list \\ false) do
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defp print_suggestions(_file, nil), do: nil
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defp print_suggestions(_file, ""), do: nil
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defp print_suggestions(file, suggestions) do
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IO.write(file, "Suggestions:\n")
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