Which documentation?

Documentation website

What needs to be documented?

In https://awkward-array.org/doc/main/user-guide/how-to-combinatorics-cartesian-combinations.html#combinations-with-axis-1 the diagram

has two issues:

• Unlike for the case of ak.cartesian, there should be no purple portion of the squares since the input is all yellow; and
• For the third element, the number of sub-elements should be 1, not 2, as $\binom{2}{2}=1$

cc @henryiii @davidlange6