Update nomicon on drop flags

[sanxiyn]

Fix #38481.

r? @steveklabnik

[steveklabnik]

Thank you! However, in documentation, we generally don't talk about versions of Rust like this. Could you instead cut everything but the actual explanation of how it's done today? Thanks!

[liigo]

Version is useful information here.

[liigo]

You mentioned version is stable version, right?

[steveklabnik]

Docs are always written in the present tense; we distribute them with each version of Rust, so if you wanted to see how something works on a particular version, you'd download those docs. This is of course, modulo bugs like this. Regardless, including "since version x.y.z" isn't how we write any docs, so this should be in line with the rest of Rust's documentation.

[petrochenkov]

"since version x.y.z" isn't how we write any docs

It's never late to start!
A small piece of history looks useful and fitting in this context, why throw it away in favor of some formalities.

[steveklabnik]

Because we believe that it's a better way to write documentation.

Anyway, this isn't the right place to argue about it; a policy change here would need a docs RFC, so if you'd like this to land before then, you gotta make it fit with the current way we write docs, sorry.

[steveklabnik]

ping @sanxiyn ! Can you make the change I requested, please?

[pnkfelix]

nit: this should say "no longer take up any ...", not "no more take up any ..."

[sanxiyn]

I am not sure how best to reword this, maybe someone else can do so. Thanks for review!