Rollup merge of rust-lang#83081 - hyd-dev:assert-message, r=m-ou-se

Fix panic message of `assert_failed_inner`

cc rust-lang#79100 (comment)

r? ``@m-ou-se``

Author: JohnTitor

core/src/panicking.rs

@@ -154,7 +154,7 @@ fn assert_failed_inner(
         Some(args) => panic!(
             r#"assertion failed: `(left {} right)`
   left: `{:?}`,
- right: `{:?}: {}`"#,
+ right: `{:?}`: {}"#,
             op, left, right, args
         ),
         None => panic!(