Add --generate_subdirs option for doc mode

[user27182]

This feature was implemented as part of #211 for the unit tests. This PR adds this same feature to the doc mode tests.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.04%. Comparing base (ea3bfac) to head (e54cc22).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #213      +/-   ##
==========================================
+ Coverage   97.98%   98.04%   +0.05%     
==========================================
  Files           3        3              
  Lines         597      614      +17     
  Branches       77       77              
==========================================
+ Hits          585      602      +17     
  Misses          5        5              
  Partials        7        7              

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[user27182]

New doc mode tests were added in b2a252d. This caused tests unrelated to doc mode to fail the test suite to crash. Confirmed in 14bd31d that the tests all pass again when these are removed.

Must be some sort of leak somewhere causing these failures.

[user27182]

Must be some sort of leak somewhere causing these failures.

Indeed closing all plotters with an autouse fixture resolves this. be7a06e

[akaszynski]

Waiting to review until #222 and #223 are merged.

[user27182]

Ready for review.

[akaszynski]

Good to go.