Fix bug where acronyms rule would incorrectly always capitalize potentially matching acronyms one letter before end of identifier

[calda]

Fixes #2218

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.40%. Comparing base (90ce9b7) to head (9b2065d).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2226      +/-   ##
===========================================
+ Coverage    95.39%   95.40%   +0.01%     
===========================================
  Files          155      155              
  Lines        30069    30069              
===========================================
+ Hits         28684    28688       +4     
+ Misses        1385     1381       -4     

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