diffus 0.9.0

# rustc version
rustc 1.42.0-nightly (a9dd56ff9 2019-12-30)# docs.rs version
docsrs 0.6.0 (2d412a6 2019-12-27)# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/diffus-0.9.0/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/diffus-0.9.0/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1001" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=-Z unstable-options --resource-suffix -20191230-1.42.0-nightly-a9dd56ff9 --static-root-path / --extern-html-root-url itertools=https://docs.rs/itertools/0.8.2" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "doc" "--lib" "--no-deps"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 62c375036171e512511d4a0ce28bff16abe6714b800c36947b544be664ddfdbc
[INFO] running `"docker" "start" "-a" "62c375036171e512511d4a0ce28bff16abe6714b800c36947b544be664ddfdbc"`
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]  Documenting diffus v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.77s
[INFO] running `"docker" "inspect" "62c375036171e512511d4a0ce28bff16abe6714b800c36947b544be664ddfdbc"`
[INFO] running `"docker" "rm" "-f" "62c375036171e512511d4a0ce28bff16abe6714b800c36947b544be664ddfdbc"`
[INFO] [stdout] 62c375036171e512511d4a0ce28bff16abe6714b800c36947b544be664ddfdbc