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    //! Prints "Hello, world!" on the OpenOCD console using semihosting
    //!
    //! ---
    //!
    //! ```
    //!
    //! #![no_main]
    //! #![no_std]
    //!
    //! #[macro_use]
    //! extern crate cortex_m_rt as rt;
    //! extern crate cortex_m_semihosting as sh;
    //! extern crate panic_semihosting;
    //!
    //! use core::fmt::Write;
    //!
    //! use rt::ExceptionFrame;
    //! use sh::hio;
    //!
    //! entry!(main);
    //!
    //! fn main() -> ! {
    //!     let mut stdout = hio::hstdout().unwrap();
    //!     writeln!(stdout, "Hello, world!").unwrap();
    //!
    //!     loop {}
    //! }
    //!
    //! exception!(HardFault, hard_fault);
    //!
    //! fn hard_fault(ef: &ExceptionFrame) -> ! {
    //!     panic!("HardFault at {:#?}", ef);
    //! }
    //!
    //! exception!(*, default_handler);
    //!
    //! fn default_handler(irqn: i16) {
    //!     panic!("Unhandled exception (IRQn = {})", irqn);
    //! }
    //! ```
    // Auto-generated. Do not modify.

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