minigrepf

This is the simple minigrepf command line tool from the book "The Rust Programming Language," chapter 12.

Usage: ``` $ ls poem.txt minigrepf

$ cat poem.txt I'm nobody! Who are you? Are you nobody, too? Then there's a pair of us - don't tell! They'd banish us, you know.

How dreary to be somebody! How public, like a frog To tell your name the livelong day To an admiring bog!

$ ./minigrepf to poem.txt Are you nobody, too? How dreary to be somebody!

$ IGNORE_CASE=1 ./minigrepf to poem.txt Are you nobody, too? How dreary to be somebody! To tell your name the livelong day To an admiring bog! ```