Fountain and nib pens as medium

BUR #8435 has been approved by @nonamethanks.

create alias fountain_pen_(medium) -> nib_pen_(medium)

Fountain_pen is aliased to nib_pen_(object)

I think it should just be pen (medium). Nib pen is the best possible name if you really want to avoid ballpoint pen / rollerball pen art, but professional non-nib pens can produce the same output on paper. You don't have to look too far in art and image searches to find non-nib pen art that is visually indistinguishable from nib pen art.

Typically, if you can tell art was drawn with a non-nib pen (and not just because the ink is blue), it was probably either:

• drawn with a shit pen, or
• not high quality anime-style art, often evident by shading using less pen pressure instead of hatching/stippling techniques.

So if it's called pen (medium), 99% of the posts will be with nib pens anyway.

The bulk update request #8435 (forum #203264) has been approved by @nonamethanks.