splice_fonts() Reduces its arguments to a flat list. It
accepts indinstinctly font objects, lists of font
objects (obtained with fonts()), or collections of
fonts produced by font_variants() or
font_families(). Duplicate fonts are removed from the
result.
Usage
splice_fonts(...)
Arguments
...
Fonts or collections of fonts. See
font_families() and font_variants()
for creating collections of fonts. You can also supply lists of
individual fonts as returned by fonts().