[doc] Use "param" instead of "code" to refer to parameters #3

[asmaloney]

One of several commits to fix all of the class XML docs (see #64134, #64164).

[YuriSizov]

Looks good. I've decided not to add any changes to the language of the docs, even though some places could really use it. Ultimately it's not in the scope of these PRs, and they are big as is.

But we should consider doing more clean-up passes in the future. One thing that definitely can be improved is parameter naming. We need to move away from concatenated, shortened names (newname, idx => new_name, index), as well as short, abstract, non-descriptive names (to, at). IMO names below 3 characters should not be allowed at all, unless it's something extremely obvious, like X, Y, and Z aspects of a vector.

[YuriSizov]

Thanks!

[asmaloney]

I agree - I've noticed a lot of this (idx in particular drives me crazy 😆). And some inconsistencies like one function enable_foo taking enable and then its counterpart disable_foo taking disabled. These should be consistent - enable/disable or enabled/disabled.