renamed dimension folded indices to be clearer

[peterkuriyama-NOAA]

Co-authored-by: Kathryn Doering kathryn.doering@noaa.gov
Co-authored-by: Meg Oshima MOshima-PIFSC@users.noreply.github.com
Co-authored-by: Chris Legault chris.legault@noaa.gov

What is the feature?

• Rename dimension folded indices to be clearer

How have you implemented the solution?

Replaced index_ya and index_ya2 to be i_age_year and i_agem1_yearm1

Does the PR impact any other area of the project?

No anticipated changes to input and output

How to test this change

Not applicable, checked with github actions

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[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files	Coverage Δ
.../include/interface/rcpp/rcpp_objects/rcpp_data.hpp	95.74% <100.00%> (ø)
inst/include/population_dynamics/fleet/fleet.hpp	96.20% <100.00%> (-0.10%)	⬇️
...lude/population_dynamics/population/population.hpp	100.00% <100.00%> (ø)

... and 11 files with indirect coverage changes

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[github-actions]

Instructions for code reviewer

Hello reviewer, thanks for taking the time to review this PR!

• Please use this checklist during your review, checking off items that you have verified are complete!
• For PRs that don't make changes to code (e.g., changes to README.md or Github actions workflows), feel free to skip over items on the checklist that are not relevant. Remember it is still important to do a thorough review.
• Then, comment on the pull request with your review indicating where you have questions or changes need to be made before merging.
• Remember to review every line of code you’ve been asked to review, look at the context, make sure you’re improving code health, and compliment developers on good things that they do.
• PR reviews are a great way to learn, so feel free to share your tips and tricks. However, for optional changes (i.e., not required for merging), please include nit: (for nitpicking) before making the suggestion. For example, nit: I prefer using a data.frame() instead of a matrix because...
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Checklist

• The PR is requested to be merged into the appropriate branch (typically main)
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• The functionality is good for the users of the code.
• Any User Interface changes are sensible and look good.
• The code isn’t more complex than it needs to be.
• Code coverage remains high, indicating the new code is tested.
• The developer used clear names for everything.
• Comments are clear and useful, and mostly explain why instead of what.
• Code is appropriately documented (doxygen and roxygen).

[iantaylor-NOAA]

Change are straightforward and improve clarity. I like the improved naming convention.