Add errant protobuf-generated Ruby file
user
```ruby
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: soapbox.proto

require 'google/protobuf'

Google::Protobuf::DescriptorPool.generated_pool.build do
  add_message "soapbox.Empty" do
  end
end

module Soapbox
  Empty = Google::Protobuf::DescriptorPool.generated_pool.lookup("soapbox.Empty").msgclass
end
```
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