Improve error message for tab_options() wrong input

[olivroy]

Summary

While working on something else, I noticed that the error message for wrong type for options was not informative.

check_*() won't allow NA by default, although it is possible to override this!

Using arg = var_name allows to include the faulty argument's name. (although it will loose its . for _ due to tidy_gsub(), but will still be informative!

# Before
exibble |> gt() |> tab_options(footnotes.multiline = "\n")
#> Error in `dplyr::mutate()`:
ℹ In argument: `value = mapply(...)`.
Caused by error:
! rlang::is_scalar_logical(option) is not TRUE

# This PR
#> Error in `tab_options()`:
#> ! `footnotes_multiline` must be `TRUE` or `FALSE`, not the string "\n".

Checklist

• I understand and agree to the Code of Conduct.
• I have listed any major changes in the NEWS.
• I have added testthat unit tests to tests/testthat for any new functionality.

[rich-iannone]

Thanks!

[rich-iannone]

@olivroy feel free to merge this at your convenience.

[olivroy]

@rich-iannone I don't have the rights to do this

[rich-iannone]

Sorry for the delay (and the misunderstanding above). Will merge now.