undo 0.37.0

# rustc version
rustc 1.39.0-nightly (66bf391c3 2019-09-23)
# docs.rs version
docsrs 0.6.0 (9f82bae 2019-09-30)

# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/undo-0.37.0/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/undo-0.37.0/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 -20190923-1.39.0-nightly-66bf391c3 --static-root-path / --disable-per-crate-search --extern-html-root-url rustc_hash=https://docs.rs/rustc-hash/1.0.1" "-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-2019-09-24" "doc" "--lib" "--no-deps" "--target" "x86_64-unknown-linux-gnu" "--features" "chrono display"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 288a9cdff73360dcc70c343fc76c999a010b32534266b203ceeeabcb4f49ddc8
[INFO] running `"docker" "start" "-a" "288a9cdff73360dcc70c343fc76c999a010b32534266b203ceeeabcb4f49ddc8"`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling winapi v0.3.8
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rgb v0.8.14
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking rustc-hash v1.0.1
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking winconsole v0.10.0
[INFO] [stderr]     Checking colored v1.8.0
[INFO] [stderr]  Documenting undo v0.37.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.92s
[INFO] running `"docker" "inspect" "288a9cdff73360dcc70c343fc76c999a010b32534266b203ceeeabcb4f49ddc8"`
[INFO] running `"docker" "rm" "-f" "288a9cdff73360dcc70c343fc76c999a010b32534266b203ceeeabcb4f49ddc8"`
[INFO] [stdout] 288a9cdff73360dcc70c343fc76c999a010b32534266b203ceeeabcb4f49ddc8