Expand a doc sentence according to code review
//! -- no problem, reuse [`dptree::Handler::filter`], [`dptree::case!`], and
//! other combinators in the same way!
//!
-//! Finally, we define our endpoints like this:
+//! Finally, we define our endpoints via simple `async` functions like this:
//!
//! <details>
//! <summary>Show the endpoints</summary>
