Update some functor product notations

I'm not sure how happy I am with them.  But things like [HomFunctor C ⟨
F ⟨ ─ ⟩ , ─ ⟩] now work!

After    | File Name                             | Before
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0m17.34s | Category/Equality                     | 0m17.33s
0m10.94s | Comma/Duals                           | 0m10.02s
0m08.94s | Groupoid                              | 0m09.09s
0m08.05s | Comma/InducedFunctors                 | 0m07.64s
0m04.62s | SumPreCategory                        | 0m04.76s
0m04.39s | Functor/Equality                      | 0m04.48s
0m03.93s | Groupoid/Duals                        | 0m03.78s
0m03.63s | Groupoid/Functors                     | 0m03.58s
0m03.13s | UniversalProperties                   | 0m03.18s
0m02.76s | Grothendieck/ToSet                    | 0m02.83s
0m02.60s | Comma/CommaCategory                   | 0m02.54s
0m02.29s | BoolCategory                          | 0m02.36s
0m02.20s | Category/Morphisms                    | 0m02.26s
0m01.86s | NaturalTransformation/Equality        | 0m01.85s
0m01.83s | NaturalTransformation/Duals           | 0m01.97s
0m01.81s | Category/Product                      | 0m01.91s
0m01.62s | Hom                                   | 0m01.74s
0m01.45s | NaturalTransformation/Composition     | 0m01.36s
0m01.42s | NaturalTransformation/Product         | 0m00.92s
0m01.24s | NaturalTransformation/CompositionLaws | 0m01.24s
0m01.18s | Functor/Product                       | 0m00.95s
0m00.57s | InitialTerminalCategory               | 0m00.59s
0m00.50s | Functor/CompositionLaws               | 0m00.50s
0m00.45s | Comma/Projection                      | 0m00.40s
0m00.41s | Common                                | 0m00.43s
0m00.32s | IndiscreteCategory                    | 0m00.30s
0m00.32s | Discrete/Duals                        | 0m00.36s
0m00.31s | SetCategory                           | 0m00.26s
0m00.31s | Cat                                   | 0m00.25s
0m00.26s | Functor/Composition                   | 0m00.26s
0m00.26s | FunctorCategory                       | 0m00.32s
0m00.26s | NaturalTransformation/Identity        | 0m00.26s
0m00.25s | Category/Objects                      | 0m00.25s
0m00.25s | Adjoint/UnitCounit                    | 0m00.28s
0m00.24s | Functor/Duals                         | 0m00.22s
0m00.22s | IsGroupoid                            | 0m00.18s
0m00.22s | NatCategory                           | 0m00.24s
0m00.20s | Category/Core                         | 0m00.15s
0m00.17s | NaturalTransformation/Core            | 0m00.16s
0m00.16s | NatCategory/Duals                     | 0m00.16s
0m00.16s | NaturalNumbersObject                  | 0m00.13s
0m00.15s | NaturalTransformation                 | 0m00.12s
0m00.15s | Functor/Core                          | 0m00.10s
0m00.14s | Category/Duals                        | 0m00.14s
0m00.12s | ComputableCat                         | 0m00.11s
0m00.12s | Category/Category                     | 0m00.10s
0m00.12s | Grothendieck                          | 0m00.10s
0m00.11s | DiscreteCategory                      | 0m00.09s
0m00.11s | NaturalTransformation/Isomorphisms    |   N/A
0m00.10s | Functor/Identity                      | 0m00.11s
0m00.10s | Functor                               | 0m00.11s
0m00.10s | Peano                                 | 0m00.12s
0m00.07s | Category/StrictCategory               | 0m00.07s
0m00.07s | Utf8                                  | 0m00.10s
0m00.04s | NotationsUtf8                         | 0m00.05s
0m00.04s | Notations                             | 0m00.04s
-----------------------------------------------------------
1m34.60s | Total                                 | 1m32.84s
Actually add Groupoid Duals.

Oops.