Adapt ,= test to post-GLR behaviour
Adapt ,= test to post-GLR behaviour

I don't think we will ever follow S03 on that, as that implies too
much magic DWIM, and a big WAT!  Associated ticket:
  https://github.com/Raku/old-issue-tracker/issues/1915

dogbert17/roast,dogbert17/roast,perl6/roast