Clarify stroke-dashoffset negative value calculation

[vincerubinetti]

Spec section: stroke-dashoffset

where s is the sum of the dash array values.

Does "dash array values" mean the raw values provided in the attribute? Or does it refer to the array of values after being processed, with odd-length arrays being repeated to yield even-length arrays? I assume it is intended to mean the latter, as that would seem to create a smooth "march" of dashes across a path when animating between positive and negative values.

I have a suspicion that this ambiguity may also be the cause behind negative stroke-dashoffset "bugs" in Safari, as they think they are following the spec. But Chrome/Firefox sort of see past the literal words in the spec to what was intended.

Impetus for creating this issue:
https://stackoverflow.com/questions/37246113/svg-stroke-dashoffset-not-working-on-safari/61517018#61517018