Updating various m4/*.m4 files

[hummeltech]

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[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.93%. Comparing base (c4e3e62) to head (d938610).
⚠️ Report is 29 commits behind head on master.
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #496      +/-   ##
==========================================
- Coverage   81.54%   80.93%   -0.61%     
==========================================
  Files          24       24              
  Lines        5645     5234     -411     
==========================================
- Hits         4603     4236     -367     
+ Misses       1042      998      -44     

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