Constant favannat::network::net::activations::TANH

pub const TANH: fn(_: f64) -> f64 = |val| 2.0 * SIGMOID(2.0 * val) - 1.0; // {<[closure@src/network.rs:289:42: 289:78] as std::ops::FnOnce<(f64,)>>::call_once as fn(f64) -> f64}