hello-fn 0.1.0

hello fn, a test.
Documentation
# install

rustup update
rustup component list
# formatting, linting and test

cargo fmt
cargo clippy --fix
cargo test
# documenting

#[doc = "description"]

cargo doc --no-deps --open
# update crates used

cargo update
or manually change version inside Cargo.toml
# about Cargo.locak

if library, don't commit
if exucutable, commit it
# test library locally

[dependencies]
hello-fn = {path = "../hello-fn"}
# build

cargo build --verbose
# library

cargo package
cargo package --list
cargo login token
cargo publish