See the hline_at and hline_from arguments passed to stable() and
then to tab_hlines(),
st_hline(
x,
pattern = NULL,
cols = names(x$data),
n = 1,
at = NULL,
from = NULL,
nudge = 0
)and stobject
a regular expression to find rows where an hline will be
placed; passed to stringr::str_detect()
data columns to scan using pattern
number of hlines to add when a hit is found
logical or integer locations for hline passed to stable() as
hline_at
character column name used to divide a table; passed to
stable() as hline_from
push an hline down or up in the table; only applies to
indices found from using either the at or pattern arguments