doc: Clarify the message key finding logic

[poljar]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 6 untouched benchmarks

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_{Comparing poljar/clarify-advancing (baade67) with main (0636058)}

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.35%. Comparing base (ee3c987) to head (3132686).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #300      +/-   ##
==========================================
+ Coverage   91.33%   91.35%   +0.01%     
==========================================
  Files          34       34              
  Lines        4929     4939      +10     
  Branches     4929     4939      +10     
==========================================
+ Hits         4502     4512      +10     
  Misses        273      273              
  Partials      154      154              

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