unused_trait_names: make the suggestion nicer

[ada4a]

• make the message more descriptive
• reduce the diff
• make the suggestion verbose, so that the diff can be color-coded (and because it'd get formatted awkwardly otherwise)

changelog: none
(because the change is not that significant imo)

[rustbot]

Thanks for the pull request. A reviewer will take a look after it receives 2 community reviews.

In the meantime, we would highly appreciate if you could try to review any of PRs waiting on community reviews.

[CommanderStorm]

community reivew: both are fine imo, not really a diff from my POV 🤷🏻‍♂️

View changes since this review

[github-actions]

Lintcheck changes for feda972

Lint	Added	Removed	Changed
clippy::unused_trait_names	0	0	852

This comment will be updated if you push new changes

[ada4a]

I mean you're not wrong.. I'm just a sucker for smaller diffs^^

[CommanderStorm]

not really a diff from my POV

I'm just a sucker for smaller diffs

I meant "not really a substantial difference from my point of view", not git diff 😉
Misleadingly worded.

[ada4a]

And I meant "diff" as in "suggestion diff" 😅 Meaning this:

use Trait as _;
          ++++

instead of this:

- use Trait;
+ use Trait as _;