coverage: Tidy up run-coverage tests in several small ways
#114924
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When one of these tests fails, any compiler warnings will be printed to the console, which makes it harder to track down the actual reason for failure. (The outstanding warnings were found by temporarily adding `-Dwarnings` to the compiler arguments for `RunCoverage` in `src/tools/compiletest/src/runtest.rs`.)
Prior to rust-lang#114875, these tests were very sensitive to lines being added/removed, so the migration to `run-coverage` in rust-lang#112300 tried hard to avoid disturbing the existing line numbers. That resulted in some awkward reshuffling when certain comments/directives needed to be added or moved. Now that we don't have to worry about preserving line numbers, we can rearrange those comments into a more conventional layout.
These changes were made by manually running `rustfmt` on all of the test files, and then manually undoing all cases where the original formatting appeared to have been deliberate. `rustfmt +nightly --config-path=/dev/null --edition=2021 tests/run-coverage*/**/*.rs`
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…iaskrgr Rollup of 6 pull requests Successful merges: - rust-lang#114924 (coverage: Tidy up `run-coverage` tests in several small ways) - rust-lang#114927 (CI: add more debug logging to Docker caching) - rust-lang#114957 (tests: Fix tests for LoongArch64) - rust-lang#115007 (Correct and expand documentation of `handle_alloc_error` and `set_alloc_error_hook`.) - rust-lang#115098 (rust-gdbgui: remove excessive quotes) - rust-lang#115111 (compile rust-anaylzer with `x check` if it's enabled) r? `@ghost` `@rustbot` modify labels: rollup
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Prior to #114875 (anonymized line numbers), these tests were very sensitive to lines being added/removed, since doing so would change the line numbers in every subsequent line of output. Therefore they ended up with a few small style issues that weren't worth the hassle of fixing.
Now that we can freely rearrange lines without needing to re-bless the entire output, we can tidy up the tests in various trivial ways.