Remove whitespace

README.md

@@ -549,7 +549,7 @@ See also [A comparison of operating systems written in Rust](https://github.com/
 * Espressif
   * [esp-rs](https://github.com/esp-rs) home to a number of community projects enabling the use of the Rust programming language on various SoCs and modules produced by Espressif Systems.
 * nRF
-  * [nrf-rs/nrf-hal](https://github.com/nrf-rs/nrf-hal) — A Rust HAL for the nRF family of devices 
+  * [nrf-rs/nrf-hal](https://github.com/nrf-rs/nrf-hal) — A Rust HAL for the nRF family of devices
 [![build badge](https://api.travis-ci.org/nrf-rs/nrf-hal.svg?branch=master)](https://travis-ci.org/nrf-rs/nrf-hal)
 * Raspberry Pi
   * [Ogeon/rust-on-raspberry-pi](https://github.com/Ogeon/rust-on-raspberry-pi) — instructions for how to cross compile Rust projects for the Raspberry Pi .