Clarify @tag (cuke style) functionality in documentation
Created by: NickLaMuro
With the previous documentation, it was unclear if the passed in tag using the @ (cucumber style tagging) would be ignored similar to doing ~tag (for --tag @tag), or if it would "ignore" the @ when building the configuration option (@tag changes to :tag).
Looking at the implementation in lib/rspec/core/option_parser.rb confirms that it is the latter, so the wording has been updated to make that more clear.
I was reading through this documentation myself recently, and was unsure when I read this what this did, so this is simply phrasing it in a way that made it more clear to me.
Open to suggestions for a better way to phrase this.