Breakage with trailing slash

[HoneyryderChuck]

I get a backtrace crash with a very simple example: I set a rest resource endpoint, and when I GET the endpoint without the trailing slash, it works. When I don't, it throws an error and gets unhandled. Here's part of the backtrace that might be relevant:

#<ArgumentError: wrong number of arguments (given 1, expected 0)>                                                     
/home/.bundle/ruby/2.3.0/gems/roda-rest_api-2.0.1/lib/roda/plugins/rest_api.rb:233:in `block in index'
/home/.bundle/ruby/2.3.0/gems/roda-2.20.0/lib/roda.rb:807:in `if_match'
/home/.bundle/ruby/2.3.0/gems/roda-2.20.0/lib/roda.rb:743:in `_verb'
/home/.bundle/ruby/2.3.0/gems/roda-2.20.0/lib/roda.rb:370:in `get'
/home/.bundle/ruby/2.3.0/gems/roda-rest_api-2.0.1/lib/roda/plugins/rest_api.rb:234:in `index'
/home/.bundle/ruby/2.3.0/gems/roda-rest_api-2.0.1/lib/roda/plugins/rest_api.rb:89:in `block in routes!'

Here is a small route dec to reproduce the issue:

route do |r|
  r.on "foo" do
    "bar"
  end
  r.api path: '' do
    r.version 1 do
      r.resource :foos do |foos|
        foos.list { %w(bar) * 8  }
      end
    end
  end
end

Now use curl and fetch the following URLs:

• http://%{host}:{port}/foo
• http://%{host}:{port}/foo/
• http://%{host}:{port}/v1/foos
• http://%{host}:{port}/v1/foos/

With this example I demonstrate that the problem is not roda (I'm using 2.21), which correctly handles the trailing slash. You can also see that this gem uses the #get method to set the show/index, and roda doesn't handle trailing slashes with this. But even when that happens, roda doesn't crash (just 404's).