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Issue when turning off AutoHelp or AutoVersion #821

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@carstencodes

Description

@carstencodes

Symptom

When turning off AutoVersion (or AutoHelp) in the ParserSettings, the HelpText still announces these commands as being available.

Root cause

In the Parser Class, the method MakeParserResult is called, which may call DisplayHelp.

DisplayHelp calls HelpText.AutoBuild, which creates a HelpText instance with AutoVersion and AutoHelp always set to true no matter which value has been set in the ParserSettings instance.

How to reproduce

public static class Program {

[Verb("do")]
public class Options {
    [Option("what")]
    public string What { get; set; }
}

static void Main(string args[]){
Parser p = new Parser(s => { s.AutoVersion = false });
ParserResult<object> r = p.Parse<object>(args, typeof(Options));

}
}

Calling the project without any options results in a helptext that includes the 'version' command, which is officially turned of.

If the user then calls the application with the version verb, an error is produced, since the version verb is not known.

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