[math-fun] Catalan's remains mysterious

I just fixed an egregious paste-o in gosper.org/pathi.pdf giving a second, spurious value for ζ(2,¼) instead of the intended ζ(2,¾), leading to an absurd "closed form" for Catalan's constant. --rwg (I also wasted > ½ an hr trying to figure out why the new pdf didn't replace the old one at gosper.org. Eventually it did.) DLMF question: Due to the braindead hidden 1 in ₂F₁ notation, it can't express arcsin². So where in DLMF is the ₃F₂?