doc: improve phrasing

Author: phip1611

src/lib.rs

@@ -50,8 +50,9 @@
 //!
 //! # Overview
 //!
-//! Use [`Uart16550Tty`] for a quick start. For more fine-grained low-level
-//! control, please have a look at [`Uart16550`] instead.
+//! Use [`Uart16550Tty`] for a quick start to write to a terminal via your
+//! serial connection. For more fine-grained low-level control, please have a
+//! look at [`Uart16550`] instead. The following examples refer to the latter.
 //!
 //! # Example (Minimal - x86 Port IO)
 //!