ParseErrorResult creates a new HelpAction for ShowHelp

[seanadams9]

If you have a created a custom help action for your commands and there is a parse error then the if creates a new HelpAction with the default HelpBuilder.

Wondering if this shouldn't be changed to look for the HelpOption on the command and call that Action instead?

[marcpopMSFT]

@jonsequitur what is the timeframe for 2.0 GA? This is blocking the above linked command line codeflow as it breaks a test (and breaks how our help works when there are errors). We just need to know how to proceed here (unblock the test while this gets fixed or wait)

[jonsequitur]

I'm working on a fix, which is pretty straightforward. I'll PR it today.