free: use no empty line as delimiter with `--line` #924

Job	Run time
Code Coverage (ubuntu-latest, unix)	1m 17s
cargo check (ubuntu-latest)	15s
cargo test (ubuntu-latest)	31s
cargo fmt --all -- --check	4s
Code Coverage (macos-latest, macos)	1m 28s
cargo check (macOS-latest)	24s
cargo test (macOS-latest)	30s
Code Coverage (windows-latest, windows)	3m 36s
cargo check (windows-latest)	1m 28s
cargo test (windows-latest)	1m 49s
	11m 22s

Provide feedback