[i18n-activity] How to handle mismatched sequences in complex ruby

r12a has just created a new issue for 
https://github.com/w3c/i18n-activity:

== How to handle mismatched sequences in complex ruby ==
I may have missed it, but i think the spec doesn't say anything about 
what should happen if, for example, an rbc contains 2 rb items and the
 rtc contains 4 rt items, or vice versa.


Please view or discuss this issue at 
https://github.com/w3c/i18n-activity/issues/316 using your GitHub 
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