Add flag to turn off helptext generation from comments

[brentyi]

Fixes #242

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.82%. Comparing base (c5be357) to head (0a21c02).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #246      +/-   ##
==========================================
+ Coverage   99.78%   99.82%   +0.03%     
==========================================
  Files          28       28              
  Lines        2326     2248      -78     
==========================================
- Hits         2321     2244      -77     
+ Misses          5        4       -1     

Flag	Coverage Δ
unittests	99.82% <100.00%> (+0.03%)	⬆️

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