`tab_row_group()` signals warning when used successively

[kinto-b]

Annoying warning is signaled when adding two or more groupings by hand

library(dplyr)
mtcars %>% 
gt::gt() %>% 
gt::tab_row_group(group = "One", rows = which(mtcars$am == 1)) %>% 
gt::tab_row_group(group = "Zero", rows = which(mtcars$am == 0))

# Warning messages:
# 1: In min(rows_matched) : no non-missing arguments to min; returning Inf
# 2: In max(rows_matched) : no non-missing arguments to max; returning -Inf

[rich-iannone]

Thanks for reporting on this, seeing it as well. Currently working on fixing this (along with a bigger issue) in a branch that will be a PR soon.