Improve documentation generation #1173

Job	Run time
Test (stable)	12s
Check (aarch64-apple-darwin)	29s
Clippy	7s
Test (1.63.0)	2m 27s
Rustfmt	7s
Check (aarch64-apple-ios)	29s
Test (beta)	18s
Check (aarch64-apple-tvos)	28s
Test (nightly)	20s
Check (aarch64-apple-watchos)	28s
Check (aarch64-linux-android)	32s
Test (macos)	30s
Test (windows)	1m 27s
Check (aarch64-unknown-freebsd)	30s
Check (aarch64-unknown-linux-gnu)	35s
Check (aarch64-unknown-linux-musl)	30s
Check (aarch64-unknown-netbsd)	29s
Check (aarch64-unknown-openbsd)	31s
Check (aarch64-unknown-redox)	29s
Check (arm-linux-androideabi)	31s
Check (arm64_32-apple-watchos)	28s
Check (armv7-linux-androideabi)	31s
Check (armv7-sony-vita-newlibeabihf)	28s
Check (i686-linux-android)	29s
Check (i686-unknown-linux-gnu)	29s
Check (sparcv9-sun-solaris)	28s
Check (x86_64-apple-darwin)	29s
Check (x86_64-apple-ios)	29s
Check (x86_64-pc-solaris)	29s
Check (x86_64-pc-windows-msvc)	31s
Check (x86_64-unknown-dragonfly)	28s
Check (x86_64-unknown-freebsd)	30s
Check (x86_64-unknown-fuchsia)	31s
Check (x86_64-unknown-illumos)	33s
Check (x86_64-unknown-linux-gnu)	30s
Check (x86_64-unknown-linux-musl)	31s
Check (x86_64-unknown-netbsd)	30s
Check (x86_64-unknown-openbsd)	28s
Check (x86_64-unknown-redox)	31s
	20m 52s

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