Resolve R CMD check NOTES

[gowerc]

Closes #122

[github-actions]

Code Coverage Summary

Filename                Stmts    Miss  Cover    Missing
--------------------  -------  ------  -------  --------------------------
R/ascii_tables.R          114       8  92.98%   10, 154, 165, 170-173, 232
R/cast_variables.R         49       0  100.00%
R/diffdf.R                209      18  91.39%   373-390, 417
R/generate_keyname.R       12       0  100.00%
R/identify.R              152       8  94.74%   283-290
R/is_different.R           52       0  100.00%
R/issuerows.R              40       0  100.00%
R/issues.R                 17       1  94.12%   51
R/misc_functions.R         34       2  94.12%   9, 13
R/print.R                  20       0  100.00%
TOTAL                     699      37  94.71%

Results for commit: ea4986b

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

  1 files   13 suites   7s ⏱️
 54 tests  52 ✅ 2 💤 0 ❌
587 runs  579 ✅ 8 💤 0 ❌

Results for commit ea4986b.