feature(make_docs.nu): adjust the input/output section generation

[raoulkent]

Now uses the data directly from help {command} to ensure that the table
is fully populated by all input/output combinations.

Is meant to address #1931

However, it is lacking in that it now is not clear which of the IO pairs is the default etc (details found when inspecting with scope commands. However, scope commands instead hides details when applying deduping logic

sigs.dedup_by(|(k1, _), (k2, _)| k1 == k2);

[fdncred]

However, it is lacking in that it now is not clear which of the IO pairs is the default

I don't think there is a default. Just a list.

[132ikl]

I don't think there is a default. Just a list.

this is correct: while from a user perspective one is the default and one is flag specific, this isn't encoded in our Signature right now. this is something that has to be fixed in nushell itself, we can't band-aid fix it in the docs. I think this PR is the correct solution for #1931

[raoulkent]

@fdncred @132ikl cheers. Reopened the pr

[132ikl]

almost there, thank you!

[132ikl]

thanks!