Try to make the doc page for this class be generated again

The API doc page for this class hasn't been generated for a long time. The generation error can be seen on build 348 logs (or if that log file has been removed, latest build logs).

I'm not sure changes in this MR can resolve the error, but I cannot find any other possible cause, so this is more like a guess. Anyway, even in case the guess is incorrect, these changes should not create more syntax errors, as many other places already use double backticks (``).