Reference image update

[AshtonSBradley]

Summary

• Updates the reference image test harness to look for a refimages-v3 release asset.
• Fixes the @inof typo that currently stops reference/compare.jl before image comparison can run.
• Creates nested output directories before saving comparison artifacts, so failures for paths such as basics/punctuation.png and spacing/...png upload useful images.

Explanation

The current ReferenceTests workflow fails before it can provide useful comparison artifacts. First, the script hits a typo in an added logging call. After that is fixed, nested reference image paths need their parent directories created before save writes comparison figures.

This PR keeps the existing release-asset model for reference images and changes the default reference tag from refimages-v2 to refimages-v3. The refreshed archive is not committed because *.tar is ignored by the repository; it should be uploaded as the reference_images.tar asset for the new refimages-v3 release.

Sorry for the extra follow-up here. This is only provided in case it might be useful; please ignore if not.

Refreshed archive candidate:

• File: /private/tmp/MathTeXEngine-reference_images-refreshed.tar
• SHA256: faa877773479c148e600bf35de5573c4d87fbc4c2f80b0986af3a26c435b95c0

Tests

• git diff --check: passed.
• julia --project=reference --startup-file=no -e 'Meta.parseall(read("reference/compare.jl", String)); println("parse ok")': passed.
• REUSE_IMAGES_TAR=1 julia --project=reference --startup-file=no reference/compare.jl: passed, 23/23 reference images.
• julia --project=reference --startup-file=no reference/compare.jl against the currently published refimages-v2: failed, 1 passed / 22 failed, but now writes comparison artifacts instead of crashing.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.39%. Comparing base (efdbaab) to head (61e8434).
⚠️ Report is 26 commits behind head on master.
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #158      +/-   ##
==========================================
+ Coverage   79.93%   88.39%   +8.45%     
==========================================
  Files          10       10              
  Lines         658      905     +247     
==========================================
+ Hits          526      800     +274     
+ Misses        132      105      -27     

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[Kolaru]

Thanks a lot for the help! It was a struggle because everything worked well locally.

It seems like that even with the correct reference image there are some small discrepancies that make the test fail.

Also with the updated setup, the image comparison is not really useful... I will have a look into those things.