Updating error message in rename_ard_columns()

[ddsjoberg]

What changes are proposed in this pull request?
Error message update for rename_ard_columns(unlist) to indicate the function to call to assist with NULL values.

Reference GitHub issue associated with pull request. e.g., 'closes #'
closes #332

---

Pre-review Checklist (if item does not apply, mark is as complete)

• All GitHub Action workflows pass with a ✅
• PR branch has pulled the most recent updates from master branch: usethis::pr_merge_main()
• If a bug was fixed, a unit test was added.
• Code coverage is suitable for any new functions/features (generally, 100% coverage for new code): devtools::test_coverage()
• Request a reviewer

Reviewer Checklist (if item does not apply, mark is as complete)

• If a bug was fixed, a unit test was added.
• Run pkgdown::build_site(). Check the R console for errors, and review the rendered website.
• Code coverage is suitable for any new functions/features: devtools::test_coverage()

When the branch is ready to be merged:

• Update NEWS.md with the changes from this pull request under the heading "# cards (development version)". If there is an issue associated with the pull request, reference it in parentheses at the end update (see NEWS.md for examples).
• All GitHub Action workflows pass with a ✅
• Approve Pull Request
• Merge the PR. Please use "Squash and merge" or "Rebase and merge".

[ddsjoberg]

@laywang142 thank you for the suggestion! Rather than updating the NULL values for the users, we're now directing users to a function that will do it for them. I like that is keeps changing data/results intentional by the user.

[github-actions]

Unit Tests Summary

  1 files  164 suites   33s ⏱️
161 tests  84 ✅ 77 💤 0 ❌
311 runs  214 ✅ 97 💤 0 ❌

Results for commit 8fbf5f4.

♻️ This comment has been updated with latest results.

[github-actions]

Unit Test Performance Difference

Test Suite	$Status$	Time on main	$±Time$	$±Tests$	$±Skipped$	$±Failures$	$±Errors$
selectors	💔	$0.03$	$+1.33$	$0$	$0$	$0$	$0$

Additional test case details

Test Suite	$Status$	Time on main	$±Time$	Test Case
add_calculated_row	💔	$0.09$	$+1.12$	add_calculated_row_x_
ard_continuous	💚	$3.67$	$-2.94$	ard_continuous_works
ard_hierarchical	💔	$7.97$	$+1.42$	ard_hierarchical_works_without_by_variables
print_ard_conditions	💔	$0.02$	$+1.10$	print_ard_conditions_works
selectors	💔	$0.03$	$+1.33$	selectors_work

Results for commit ff5dd25

♻️ This comment has been updated with latest results.

[github-actions]

Code Coverage Summary

Filename                       Stmts    Miss  Cover    Missing
---------------------------  -------  ------  -------  -------------------------------
R/add_calculated_row.R            46       0  100.00%
R/apply_fmt_fn.R                 106       0  100.00%
R/ard_attributes.R                36       1  97.22%   57
R/ard_categorical.R              350      10  97.14%   238, 395-399, 406-407, 583, 617
R/ard_complex.R                   36       1  97.22%   83
R/ard_continuous.R               178       3  98.31%   207-208, 306
R/ard_dichotomous.R               80       1  98.75%   62
R/ard_hierarchical.R              72       0  100.00%
R/ard_missing.R                   58       1  98.28%   50
R/ard_stack_hierarchical.R       232       1  99.57%   455
R/ard_stack.R                     90       1  98.89%   117
R/ard_total_n.R                   10       0  100.00%
R/as_card.R                        5       0  100.00%
R/as_nested_list.R                41       0  100.00%
R/bind_ard.R                      47      11  76.60%   74-85
R/check_ard_structure.R           39       6  84.62%   31, 55-59
R/default_stat_labels.R           18       0  100.00%
R/eval_capture_conditions.R       30       0  100.00%
R/get_ard_statistics.R            16       0  100.00%
R/mock.R                         137       2  98.54%   116, 244
R/nest_for_ard.R                  71       1  98.59%   60
R/print_ard_conditions.R          78       0  100.00%
R/print.R                         72       0  100.00%
R/process_selectors.R            126       1  99.21%   337
R/replace_null_statistic.R        11       0  100.00%
R/round5.R                         1       0  100.00%
R/selectors.R                     19       0  100.00%
R/shift_ard_columns.R            102       1  99.02%   185
R/shuffle_ard.R                  129       0  100.00%
R/summary_functions.R             25       1  96.00%   59
R/tidy_ard_order.R                25       0  100.00%
R/tidy_as_ard.R                   39       0  100.00%
R/update_ard.R                    53       0  100.00%
R/utils.R                         24       0  100.00%
TOTAL                           2402      42  98.25%

Diff against main

Filename                 Stmts    Miss  Cover
---------------------  -------  ------  -------
R/shift_ard_columns.R       +1       0  +0.01%
TOTAL                       +1       0  +0.00%

Results for commit: 8fbf5f4

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results