codefever

implementations of encode_family on text & protobuf are not symmetric

2

For text (https://github.com/prometheus/client_rust/blob/master/src/encoding/text.rs#L387), family inheritance is prohibited by `debug_assert`. But for protobuf (https://github.com/prometheus/client_rust/blob/master/src/encoding/protobuf.rs#L236), the iniheritantce is allowed. Is there any special consideration? I found these when i was implementing a...