OneLogin::RubySaml::Response#status_code appending extra chars when response is not successful.

[caioeps]

How to reproduce:

r = Base64.decode64('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')

OneLogin::RubySaml::Response.new(r).status_code
=> "urn:oasis:names:tc:SAML:2.0:status:Responder | "

Please notice the trailing |.

I'll try and prepare a PR for that over this weekend.