Rust

Create custom HTML formatters. #1247

Job	Run time
build_bin_spec (nightly)	26m 35s
build_wasm (nightly)	46s
build_bin_spec (beta)	1m 10s
build_lib_test (nightly)	49s
build_wasm (beta)	47s
lockfile	54s
build_lib_test (beta)	1m 3s
build_bin_spec (stable)	54s
build_wasm (stable)	48s
build_lib_test (stable)	56s
build_bin_spec ($MSRV)	3m 16s
build_wasm ($MSRV)	3m 11s
build_lib_test ($MSRV)	3m 37s
no_features_build_test (nightly)	32s
no_features_build_test (beta)	25s
no_features_build_test (stable)	41s
no_features_build_test ($MSRV)	2m 40s
clippy_format	2m 54s
	51m 58s

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