Further learning by attempting to recreate unix wc
The idea and example testing file (test.txt) for this "challenge" was taken from codingchallengs.fyi.
I don't plan on turning this into an offical crate so:
cargo install --path ./path/to/learning_wc/root/
cargo uninstall learning_wc
Usage: learning_wc [OPTIONS] [FILE]...
Arguments:
[FILE]... optional files, if no files takes stdin input
Options:
-c, --bytes print the byte counts
-l, --lines print the newline counts
-w, --words print the word counts
-m, --chars print the character counts
-h, --help Print help
-V, --version Print version