format README.md

Author: harryfei

README.md

@@ -1,14 +1,17 @@
-
-# prepare
+# Prepare build environment
+```bash
 cargo install cargo-xbuild
-# how to build
+```
+
+# Build drivers
 ```bash
-# build driver for x64 
-cargo xbuild --target x86_64-kernel-windows-msvc.json 
+# build driver for x64
+cargo xbuild --target x86_64-kernel-windows-msvc.json
 # build driver for x86
-cargo xbuild --target i686-kernel-windows-msvc.json 
+cargo xbuild --target i686-kernel-windows-msvc.json
 ```
+
 # Acknowledges
-[winapi-kmd-rs](https://github.com/pravic/winapi-kmd-rs)  
-[blog_os](https://os.phil-opp.com/)  
-[cargo-xbuild](https://github.com/rust-osdev/cargo-xbuild)  
+* [winapi-kmd-rs](https://github.com/pravic/winapi-kmd-rs)
+* [blog_os](https://os.phil-opp.com/)
+* [cargo-xbuild](https://github.com/rust-osdev/cargo-xbuild)