HTML/Markdown in group heading rows is not processed

[abielr]

Currently HTML or Markdown stored in a column that is then defined as the row group (groupname_col) is not rendered properly (the characters are escaped). This appears to occur in dt_stub_df.R::dt_stub_df_init() at the following stage, which converts the column to plain text even if the gt::html or gt::md functions were used.

row_group_labels <-
  apply(
    data_tbl[, groupname_col],
    MARGIN = 1,
    paste, collapse = row_group.sep
  )

Would like to request that users be able to pass HTML/MD into the row group.

[rich-iannone]

This seems quite reasonable. While it’s not yet possible, I think the way this ought to be done is to allow formatters (fmt_markdown() in this case) to transform columns that are used for group row labels and stub labels.