Add back sequence-formats (closes #4776)
Add back sequence-formats (closes #4776)

wereHamster/stackage,asr/stackage,clinty/stackage,spencerjanssen/stackage,michalkonecny/stackage,stackbuilders/stackage,jonschoning/stackage,iand675/stackage,fpco/stackage,athanclark/stackage,simonmichael/stackage,fimad/stackage,soenkehahn/stackage,mrkkrp/stackage,Daniel-Diaz/stackage,massysett/stackage