kaprekar 0.1.5

Include a function to find number of iterations to reach Kaprekar's constant.
Documentation
Build #742321 2023-02-11T23:55:00.070056+00:00
# rustc version
rustc 1.69.0-nightly (2773383a3 2023-02-10)
# docs.rs version
docsrs 0.6.0 (4be003ec 2023-02-04)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/kaprekar-0.1.5/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/kaprekar-0.1.5/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--cpus" "3" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:542af8c9c691278ea8427c9f55ce1005b509eeebcbbcbc893145cd6832507671" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20230210-1.69.0-nightly-2773383a3\", \"--static-root-path\", \"/-/rustdoc.static/\", \"--cap-lints\", \"warn\", \"--disable-per-crate-search\", \"--extern-html-root-takes-precedence\"]" "--offline" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-Zrustdoc-scrape-examples" "-j3" "--target" "x86_64-unknown-linux-gnu", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 740b3ff4e89dac29bc96d4f374162d5dfddec425ba60129077e084d5a17d441b
[INFO] running `Command { std: "docker" "start" "-a" "740b3ff4e89dac29bc96d4f374162d5dfddec425ba60129077e084d5a17d441b", kill_on_drop: false }`
[INFO] [stderr] warning: file `/opt/rustwide/workdir/src/lib.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `lib` target `kaprekar`
[INFO] [stderr]   * `bin` target `kaprekar`
[INFO] [stderr] warning: Target filter specified, but no targets matched. This is a no-op
[INFO] [stderr]  Documenting kaprekar v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "740b3ff4e89dac29bc96d4f374162d5dfddec425ba60129077e084d5a17d441b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "740b3ff4e89dac29bc96d4f374162d5dfddec425ba60129077e084d5a17d441b", kill_on_drop: false }`
[INFO] [stdout] 740b3ff4e89dac29bc96d4f374162d5dfddec425ba60129077e084d5a17d441b