vis_comparecompare_print is an internal function that takes creates a dataframe with
information about where there are differences in the dataframe. This
function is used in vis_compare. It evaluates on the data (df1 == df2)
and (currently) replaces the "true" (the same) with "Same"
and FALSE with "Different", unless it is missing (coded as NA), in which
case it leaves it as NA.
compare_print(x)a vector