Add newline character support for ref footnotes

[Melkiades]

(pagination does not count it though for now) needed for https://github.com/insightsengineering/rtables/issues/750

[github-actions[bot]]

Code Coverage Summary

Filename             Stmts    Miss  Cover    Missing
-----------------  -------  ------  -------  ---------------------------------------------------------------------------------------------------------------
R/format_value.R       197      14  92.89%   94, 110-117, 197, 216, 287, 409, 420, 428
R/generics.R            98       4  95.92%   455, 467, 500, 529
R/labels.R              55       7  87.27%   53, 59, 68, 109, 137, 146, 150
R/matrix_form.R        454      27  94.05%   400-401, 496, 508-509, 528, 559, 648-649, 664-669, 696-697, 729-730, 762-763, 795, 881, 929, 981, 983, 986
R/mpf_exporters.R      124      12  90.32%   2, 84-86, 180, 220, 225, 408, 410, 415-416, 442
R/page_size.R           45       1  97.78%   169
R/pagination.R         503      27  94.63%   421, 493, 613-614, 619, 673-674, 692-700, 986, 993, 1018-1025, 1160-1161, 1173-1174, 1186-1187
R/tostring.R           521      26  95.01%   83, 135, 202, 236, 244-245, 280, 333-334, 423-425, 432-435, 610-611, 803, 818, 913, 966, 1007, 1052, 1107, 1114
R/utils.R                3       0  100.00%
TOTAL                 2000     118  94.10%

Diff against main

Filename           Stmts    Miss  Cover
---------------  -------  ------  -------
R/matrix_form.R      +27       0  +0.38%
R/pagination.R        +5      +5  -0.95%
R/tostring.R         +22      +1  +0.02%
TOTAL                +54      +6  -0.14%

Results for commit: 8b5c3803ee915d0d96272b2d1f174ce7c95da6b1

Minimum allowed coverage is 80%

:recycle: This comment has been updated with latest results

[github-actions[bot]]

Unit Tests Summary

    1 files      4 suites   8s :stopwatch:   33 tests   33 :heavy_check_mark: 0 :zzz: 0 :x: 228 runs  228 :heavy_check_mark: 0 :zzz: 0 :x:

Results for commit 8b5c3803.

:recycle: This comment has been updated with latest results.