```rust
$ ./target/release/linenums < Cargo.toml
1       [package]
2       name = "linenums"
3       version = "0.1.0"
4       authors = ["blakehawkins"]
5       edition = "2018"
6
7       [dependencies]
8       anyhow = "1.0.26"
9       stdinix = "0.1.0"
```