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-//! ## Documentation: Feature Flags
-//!
-//! Available [compile-time feature flags](https://doc.rust-lang.org/cargo/reference/features.html#dependency-features)
-//!
-//! #### Default Features
-//!
-//! * **std**: _Not Currently Used._ Placeholder for supporting `no_std` environments in a backwards compatible manner.
-//! * **color**: Turns on colored error messages.
-//! * **suggestions**: Turns on the `Did you mean '--myoption'?` feature for when users make typos.
-//!
-//! #### Optional features
-//!
-//! * **deprecated**: Guided experience to prepare for next breaking release (at different stages of development, this may become default)
-//! * **derive**: Enables the custom derive (i.e. `#[derive(Parser)]`). Without this you must use one of the other methods of creating a `clap` CLI listed above.
-//! * **cargo**: Turns on macros that read values from [`CARGO_*` environment variables](https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-crates).
-//! * **env**: Turns on the usage of environment variables during parsing.
-//! * **regex**: Enables regex validators.
-//! * **unicode**: Turns on support for unicode characters (including emoji) in arguments and help messages.
-//! * **wrap_help**: Turns on the help text wrapping feature, based on the terminal size.
-//!
-//! #### Experimental features
-//!
-//! **Warning:** These may contain breaking changes between minor releases.
-//!
-//! * **unstable-replace**: Enable [`Command::replace`](https://github.com/clap-rs/clap/issues/2836)
-//! * **unstable-grouped**: Enable [`ArgMatches::grouped_values_of`](https://github.com/clap-rs/clap/issues/2924)
-//! * **unstable-v4**: Preview features which will be stable on the v4.0 release