Earlier quoted context omitted.
> that one of them was elected to the county Board of Supervisors. can you explain this part of the joke?
The idea is that Rails apps are such a large portion of the population that they elected a representative from within themselves. It's not intended to be taken literally (I assume).
Must be gerrymandering or something, maybe aided by voter suppression by English speakers against those in the county whose native language is x86-64.