Revert "Merge pull request #3681 from jbmohler/use_fast_from_codes_and_v... #4007
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...erts"
This reverts commit c299457, reversing
changes made to 38d69b0.
This is a fix for #3998, but there is an underlying issue with
_fast_from_codes_and_verts
which should be sorted out.This also adds a test. After this is merged I will put in a new PR with 91725d8 re-based onto the new master.