Fix extra/missing brackets in some barcodes

[reiniscirpons]

This PR removes or adds brackets to certain barcodes to make the resulting gap files syntactically valid. In particular the derived series for n=4 is has an extra bracket which renders it invalid as gap code. For n=83 all of the barcodes are empty, which seems wrong. I tried fixing it by adding extra brackets to make the files valid gap code, but it might be better to remove the files altogether, unless there is a mathematical reason why there should not be any barcodes for n=83 (I don't have enough understanding of the mathematics to know).

[grahamknockillaree]

Thanks for spotting this.

I'll add data for n=83 soon. Actually, I think the files for prime n are all the same, so I should not really be including a separate file for each prime. I'll look into this.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.74%. Comparing base (958f3e6) to head (6c3f73a).
⚠️ Report is 8 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #145   +/-   ##
=======================================
  Coverage   44.74%   44.74%           
=======================================
  Files         349      349           
  Lines       64422    64422           
=======================================
  Hits        28825    28825           
  Misses      35597    35597           

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