`defmt-rtt`: Document "blockingness"
//! // src/main.rs or src/bin/my-app.rs
//! use defmt_rtt as _;
//! ```
+//!
+//! # Blocking/Non-blocking
+//!
+//! `probe-run` puts RTT into blocking-mode, to avoid loosing data.
+//!
+//! As an effect this implementation may block forever if `probe-run` disconnects on runtime. This
+//! is because the RTT buffer will fill up and writing will eventually halt the program execution.
+//!
+//! `defmt::flush` would also block forever in that case.
#![no_std]
