Auto merge of #69919 - Centril:rollup-fxo33zs, r=Centril

Rollup of 8 pull requests

Successful merges:

 - #66472 (--show-coverage json)
 - #69603 (tidy: replace `make check` with `./x.py test` in documentation)
 - #69760 (Improve expression & attribute parsing)
 - #69828 (fix memory leak when vec::IntoIter panics during drop)
 - #69850 (panic_bounds_check: use caller_location, like PanicFnLangItem)
 - #69876 (Add long error explanation for E0739)
 - #69888 ([Miri] Use a session variable instead of checking for an env var always)
 - #69893 (librustc_codegen_llvm: Use slices instead of 0-terminated strings)

Failed merges:

r? @ghost

Author: bors

CONTRIBUTING.md

@@ -142,7 +142,7 @@ the issue in question.
 Please make sure your pull request is in compliance with Rust's style
 guidelines by running
 
-    $ python x.py test src/tools/tidy
+    $ python x.py test tidy
 
 Make this check before every pull request (and every new commit in a pull
 request); you can add [git hooks](https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks)

src/bootstrap/README.md

@@ -55,6 +55,9 @@ The script accepts commands, flags, and arguments to determine what to do:
   # run all unit tests
   ./x.py test
 
+  # execute tool tests
+  ./x.py test tidy
+
   # execute the UI test suite
   ./x.py test src/test/ui