protobuf syntax highlight bug

[disjukr]

https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/unittest.proto

import "google/protobuf/unittest_import.proto";

message TestAllTypes {
  optional group OptionalGroup = 16 {
    optional int32 a = 17;
  }
}

message TestAllTypes {
  optional protobuf_unittest_import.ImportMessage optional_import_message  = 20;
}

message TestAllTypes {
  optional protobuf_unittest_import.PublicImportMessage
      optional_public_import_message = 26;
}

message TestAllTypes {
  oneof oneof_field {
    uint32 oneof_uint32 = 111;
    NestedMessage oneof_nested_message = 112;
    string oneof_string = 113;
    bytes oneof_bytes = 114;
  }
}

message TestDeprecatedMessage {
  option deprecated = true;
}

extend TestAllExtensions {
  // Singular
  optional    int32 optional_int32_extension    =  1;
}