test(front-matter): simplify asserts

[timreichen]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.67%. Comparing base (bcb30bb) to head (f31d47e).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6475      +/-   ##
==========================================
- Coverage   95.67%   95.67%   -0.01%     
==========================================
  Files         574      574              
  Lines       43182    43182              
  Branches     6470     6470              
==========================================
- Hits        41314    41313       -1     
- Misses       1829     1830       +1     
  Partials       39       39              

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[kt3k]

LGTM