Fix loopy-import test

Account for the fact we can now import ngrams terms containing loops.
4 jobs for adinapoli/issue-513-v2 in 53 minutes and 56 seconds (queued for 10 seconds)
latest
Status Job ID Name Coverage
  Cabal
passed #19539
cabal

00:23:29

 
  Stack
passed #19540
stack

00:03:30

 
  Bench
manual #19541
allowed to fail manual
bench
 
  Test
passed #19542
test

00:26:57