[clreq] Difficulties selecting ruby (#242)

r12a has just created a new issue for https://github.com/w3c/clreq:

== Difficulties selecting ruby ==
There are difficulties in selecting ruby text in <a href="https://github.com/w3c/i18n-issues/issues/3">some browsers</a>.

Please view or discuss this issue at https://github.com/w3c/clreq/issues/242 using your GitHub account