sha1_smol features: what each one does, and the line to copy

Short answersha1_smol 1.0.1 has 2 features. Nothing is on by default: turn on what you use.

Pick features

Turn off default features (default-features = false)

alloc std

1.0.1latest version

2features

0optional dependencies

not setMSRV (rust-version)

Feature	In default	Turns on
`alloc`		nothing else (a switch the code checks)
`std`		`alloc`

dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).