fix: Ensure existing functions are normalized in all cases.

[DanCardin]

Fixes #127

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.84%. Comparing base (48cee2e) to head (3ad4df2).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #128      +/-   ##
==========================================
+ Coverage   89.81%   89.84%   +0.02%     
==========================================
  Files          86       86              
  Lines        4056     4056              
  Branches      841      841              
==========================================
+ Hits         3643     3644       +1     
+ Misses        336      335       -1     
  Partials       77       77              

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