feature: hope add format for generated *_pb.jl

[zsz00]

hope add format for generated *_pb.jl

[Drvi]

I tried making the generated metadata methods having one field per line, but the files got really long because of that. I think if one wants to read the metadata, they should look at the proto files directly, and use these generated methods only when the need to programmatically access their values.

As a workaround, you can install JuliaFormatter and format the whole output directory of translated julia files.

[zsz00]

I update the picture :

export ..... too long

ok, I can format the whole output directory *.jl use JuliaFormatter.

[Drvi]

Yeah, for exports it kinda makes sense to have them presented in a readable way... Want to contribute?:) These lines print the export statement: https://github.com/JuliaIO/ProtoBuf.jl/blob/v1.0.2/src/codegen/toplevel_definitions.jl#L180-L185

I think I a case like this we want multiple lines starting with exportkeyword and all of them shorter than 92 characters, a la second example in the Blue Style

[zsz00]

OK, Let me try do this

[zsz00]

#207

[Drvi]

Closed via #207 and #210