Add @include_files

[IanButterworth]

See JuliaLang/julia#59951

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.54%. Comparing base (5bfa166) to head (96c437f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #846      +/-   ##
==========================================
+ Coverage   94.26%   94.54%   +0.27%     
==========================================
  Files           2        2              
  Lines         488      513      +25     
==========================================
+ Hits          460      485      +25     
  Misses         28       28              

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