I suspect this is related with
SPARK-16153 and genjavadoc issue in https://github.com/typesafehub/genjavadoc/issues/85 but I am not too sure.
Currently, single line comment does not mark down backticks to <code>..</code> but prints as they are. For example, the line below:
So, we could work around this as below:
Please refer the image in the pull request.