text_case_match() now works with tab_spanner() + .replace = "all"

[olivroy]

Summary

Before the PR, we would get

exibble %>% gt() %>% tab_spanner("the boring spanner", columns = c(num, date)) %>%
    text_case_match(
      "the boring spanner" ~ "awesome spanner",
      .replace = "all",
      .locations = cells_column_spanners()
    )
#> Error in `dplyr::case_match()` at gt/R/text_transform.R:414:9:
#> ! Can't combine `..1 (right)` <character> and `.default` <list>.

Now, it works as expected!

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]

LGTM!