save a flextable in an HTML file. This function is useful to save the flextable in HTML file without using R Markdown (it is highly recommanded to use R Markdown instead).
flextable objects, objects, possibly named. If named objects, names are used as titles.
a list (possibly named), each element is a flextable object. If named objects, names are
used as titles. If provided, argument
HTML file to be created
encoding to be used in the HTML file