Add Machine USFM manual test

[Enkidu93]

Fixes #766

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This change is 

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.11%. Comparing base (83b24d4) to head (e0dcaa1).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #785   +/-   ##
=======================================
  Coverage   66.11%   66.11%           
=======================================
  Files         370      370           
  Lines       20019    20019           
  Branches     2617     2617           
=======================================
  Hits        13236    13236           
  Misses       5852     5852           
  Partials      931      931           

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[ddaspit]

@ddaspit reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Enkidu93)