Newline and whitespace characters pass honeypot field checks

[anthonymfowler15]

We have forms being submitted with "\n" values in our honeypot fields (which are just the default a_comment_body). These are not properly being caught in the protect_from_spam method. It looks like this is because "\n".blank? returns true: https://github.com/curtis/honeypot-captcha/blob/master/lib/honeypot-captcha.rb#L18.

Can we get a modification to that function to check for parameter length as well?