set_contents() is a convenience function to change the cell contents of a huxtable within
a dplyr chain. set_contents(ht, x, y, foo) just calls ht[x, y] <- foo and returns ht.
contents(ht)
contents(ht) <- value
set_contents(ht, row, col, value)
map_contents(ht, row, col, fn)A huxtable.
Cell contents.
A row specifier. See rowspecs for details.
An optional column specifier.
A mapping function. See mapping-functions for details.