Cleanups and nits #1802

Job	Run time
clippy	2m 7s
docs	3m 1s
rustfmt	14s
nightly	3m 8s
msrv	1m 37s
basics	1s
wasm	1m 8s
build_feature (alloc)	3m 40s
test_doc	6m 3s
no_std (ubuntu-latest, minimal)	1m 18s
build_feature (cli)	4m 7s
test_lib	3m 1s
no_std (macos-latest, minimal)	1m 21s
build_feature (cli,doc)	3m 52s
test_miri (rune, runtime:: hir::arena:: --skip runtime::vm:: --skip runtime::vm_execution:: )	3m 10s
build_feature (cli,fmt)	3m 57s
test_rune	3m 11s
test_miri (rune-alloc)	6m 6s
build_feature (doc)	3m 37s
build_feature (workspace)	3m 27s
build_feature (languageserver)	3m 57s
build_feature (byte-code)	3m 17s
build_feature (capture-io)	3m 36s
build_feature (emit)	3m 18s
	1h 12m 14s

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