Cargo Features

[dependencies]
code-tour = { version = "0.2.0", default-features = false, features = ["colours", "interactive"] }
default = colours

The colours feature is set by default whenever code-tour is added without default-features = false somewhere in the dependency tree.

colours default = ansi_term
interactive

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

ansi_term colours