first set of examples (removed panic)

examples/panic.rs

-//! Changing the panicking behavior
-//!
-//! The easiest way to change the panicking behavior is to use a different [panic handler crate][0].
-//!
-//! [0]: https://crates.io/keywords/panic-impl
-
-#![no_main]
-#![no_std]
-
-// Pick one of these panic handlers:
-
-// `panic!` halts execution; the panic message is ignored
-// use panic_halt as _;
-
-// Reports panic messages to the host stderr using semihosting
-// NOTE to use this you need to uncomment the `panic-semihosting` dependency in Cargo.toml
-// use panic_semihosting as _;
-
-// Logs panic messages using the ITM (Instrumentation Trace Macrocell)
-// NOTE to use this you need to uncomment the `panic-itm` dependency in Cargo.toml
-use panic_itm as _;
-
-use cortex_m_rt::entry;
-use stm32f4 as _;
-
-#[entry]
-fn main() -> ! {
-    panic!("Oops")
-}