For instance, i have:

# a.proto file
package abc_def;
message ghi {}

Then, when generating ruby source, i got:

# a.pb.rb
module Abc_def
  class Ghi {}
end

The package named abc_def should be generated to AbcDef module, instead of Abc_def, shouldn't it?

I checked this issue: #81 (comment), but the case of the package name was not mentioned there.