Add copy button to crate version.

[MeetThePatel]

This PR closes #111143.

Instead of copying strictly the crate version number, this implementation copies a Cargo.toml 'snippet' (the same behavior as the Crates.io copy button). i.e. For a crate called very_useful_crate on version 0.1.0, the copied string would be: very_useful_crate = "0.1.0".

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @GuillaumeGomez (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

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[rustbot]

Some changes occurred in HTML/CSS/JS.

cc @GuillaumeGomez, @jsha

[GuillaumeGomez]

Looks good overall. Could you add a screenshot please?

[rustbot]

There are merge commits (commits with multiple parents) in your changes. We have a no merge policy so these commits will need to be removed for this pull request to be merged.

You can start a rebase with the following commands:

$ # rebase
$ git pull --rebase https://github.com/rust-lang/rust.git master
$ git push --force-with-lease

The following commits are merge commits:

• d33b497

[MeetThePatel]

Hi, apologies about the merge-commit snafu (still new to OSS).

This is the current docs.rs:

This is the proposed change:

[rust-log-analyzer]

The job x86_64-gnu-tools failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

.......... (130/133)
..F        (133/133)


/checkout/tests/rustdoc-gui/sidebar.goml sidebar... FAILED
[ERROR] `tests/rustdoc-gui/sidebar.goml` line 200: The following errors happened: [different X values: -5.453125 (or -5) != -3]: for command `assert-position: (".sidebar-crate > h2 > a", {"x": -3})`
Error: ()
Build completed unsuccessfully in 0:03:42
  local time: Tue Oct 22 19:18:36 UTC 2024
  network time: Tue, 22 Oct 2024 19:18:36 GMT

[GuillaumeGomez]

What do you think about this change @notriddle ?

[notriddle]

Doesn't docs.rs already have a button to do it in its menu bar? Also, the button should be on the baseline, just like it is in the main header.

But the redundancy is the biggest problem. What could we do to make what we already have easier to understand, instead of adding to it?

[bors]

☔ The latest upstream changes (presumably #136564) made this pull request unmergeable. Please resolve the merge conflicts.

[alex-semenyuk]

Triage: comment is not answered and need rebase
@rustbot label: +S-waiting-on-author, -S-waiting-on-review