Better error formatting on web #8144

Job	Run time
android	27s
Format + check + test	4m 55s
Check wasm32 + wasm-bindgen	2m 39s
cargo-deny aarch64-apple-darwin	40s
Check Windows	1m 20s
cargo-deny aarch64-linux-android	39s
cargo-deny i686-pc-windows-gnu	38s
cargo-deny i686-pc-windows-msvc	38s
cargo-deny i686-unknown-linux-gnu	38s
cargo-deny wasm32-unknown-unknown	38s
cargo-deny x86_64-apple-darwin	44s
cargo-deny x86_64-pc-windows-gnu	45s
cargo-deny x86_64-pc-windows-msvc	39s
cargo-deny x86_64-unknown-linux-gnu	39s
cargo-deny x86_64-unknown-linux-musl	39s
cargo-deny x86_64-unknown-redox	42s
	17m 20s

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