Fix typos in Rails/HttpPositionalArguments

[JoeCohen]

The cop should be disabled when you are using Rails < 5.0.
Also remove stray hash mark.

[pocke]

Thanks for your pull-request!
The file is automatically generated by comment in ruby file. So, could you edit this file, and run rake generate_cops_documentation?

[JoeCohen]

I will do this later today.

…

On Mon, Aug 14, 2017 at 5:12 PM Masataka Kuwabara ***@***.***> wrote: Thanks for your pull-request! The file is automatically generated by comment in ruby file. So, could you edit this file <https://github.com/bbatsov/rubocop/blob/1c2245df09cf0a1659b83acf0abb473e9b927a1a/lib/rubocop/cop/rails/http_positional_arguments.rb>, and run rake generate_cops_documentation? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#4664 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AACxlOglRKLIFsZsgXyT7hdGkE81Wp9lks5sYOJ2gaJpZM4O22Te> .

[JoeCohen]

Made the requested changes in #4667. (Sorry, I could not figure out how to do them in the instant issue.)