docs(clap_app!): documents the `--("some-arg")` method for using args with hyphens inside them
Closes
@@ -562,6 +562,8 @@ macro_rules! app_from_crate {
///
/// * A single hyphen followed by a character (such as `-c`) sets the [`Arg::short`]
/// * A double hyphen followed by a character or word (such as `--config`) sets [`Arg::long`]
+/// * If one wishes to use a [`Arg::long`] with a hyphen inside (i.e. `--config-file`), you
+/// must use `--("config-file")` due to limitations of the Rust macro system.
/// * Three dots (`...`) sets [`Arg::multiple(true)`]
/// * Angled brackets after either a short or long will set [`Arg::value_name`] and
/// `Arg::required(true)` such as `--config <FILE>` = `Arg::value_name("FILE")` and
