strings with explicit \n characters in TomlTable should convert to multi-line TOML Strings

[varon]

Currently, if we take this example:

[<Fact>]
let ``Multi-line string should serialize properly to multi-line toml entry``() =
    let table = TomlTable()
    let newLineString = "Hello\nNewline"
    table.Add("Example", newLineString)
    
    let result = Toml.FromModel(table)
    // we expect a triple-quoted string here for the multi-line text entry.
    Assert.Contains("\"\"\"", result)
    ()

This fails - we would expect nicely triple-quoted strings to be present here - as that's one of the major features of TOML over JSON!

I looked through the options and could not find a way to do this.

As a suggestion, I would suggest detecting if the string is actually multi-line (i.e. contains at least one \n - if it is, render with triple-quoted strings when we output it.

Thanks for creating this very useful Library.

[xoofx]

This fails - we would expect nicely triple-quoted strings to be present here - as that's one of the major features of TOML over JSON!

Your test is failing because you expect a triple-quoted string but the generated TOML is valid: ☺️

Example = "Hello\nNewline"

It would require more a e.g configuration TomlModelOptions option to change the default behavior.