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@@ -286,7 +286,7 @@ module Merb
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     # 5. Raise 406 if none found
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     def _perform_content_negotiation # :nodoc:
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       raise Merb::ControllerExceptions::NotAcceptable if _provided_formats.empty?
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-      if (fmt = params[:format]) && !fmt.empty? && _provided_formats.include?(fmt.to_sym)
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+      if (fmt = params[:format]) && !fmt.empty?
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         return fmt.to_sym
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       end
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       accepts = Responder.parse(request.accept).map {|t| t.to_sym}