feat: Combine mutually exclusive help text options into a single line.

[DanCardin]

Fixes #243

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.70%. Comparing base (de586d5) to head (c60dba7).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #250      +/-   ##
==========================================
+ Coverage   99.62%   99.70%   +0.08%     
==========================================
  Files          26       26              
  Lines        2644     2720      +76     
  Branches      576      601      +25     
==========================================
+ Hits         2634     2712      +78     
+ Misses          8        7       -1     
+ Partials        2        1       -1     

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