Re: [PATCH v2] sparse-checkout: be consistent with end of options markers

> Remove the erroneous PARSE_OPT_KEEP_UNKNOWN_OPT flag now to fix this
> bug.  Note that this does mean that anyone who might have been using
>
>   git sparse-checkout [add|set] [--[no-]cone] --foo --bar
>
> to request paths or patterns '--foo' and '--bar' will now have to use
>
>   git sparse-checkout [add|set] [--[no-]cone] -- --foo --bar
>
> That makes sparse-checkout more consistent with other git commands,
> provides users much friendlier error messages and behavior, and is
> consistent with the all-caps warning in git-sparse-checkout.txt that
> this command "is experimental...its behavior...will likely change".  :-)
>
> Signed-off-by: Elijah Newren <newren@gmail.com>
> ---