carto/protobuf @ revert-5758-delete-blank

Paul Yang e5c083ed6c Revert "delete all duplicate empty blanks (#5758)"		%!s(int64=6) %!d(string=hai) anos
..
csharp	e5c083ed6c Revert "delete all duplicate empty blanks (#5758)"	%!s(int64=6) %!d(string=hai) anos
src	9f09d1804a Add proto and test files for csharp compatibility tests against v3.0.0.	%!s(int64=8) %!d(string=hai) anos