Update README.md

README.md

@@ -79,23 +79,31 @@ macOS 原生系统进行编译：
 1.在 AppStore 中安装 Xcode
 
 2. 安装 Homebrew：
+```bash
 /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+```
 
 3. 使用 Homebrew 安装工具链、依赖与基础软件包:
+```bash
 brew unlink awk
 brew install coreutils diffutils findutils gawk gnu-getopt gnu-tar grep wget quilt xz
 brew install gcc@11
+```
 
 4.然后输入以下命令，添加到系统环境变量中：
+```bash
 echo 'export PATH="/usr/local/opt/coreutils/libexec/gnubin:$PATH"' >> ~/.bashrc
 echo 'export PATH="/usr/local/opt/findutils/libexec/gnubin:$PATH"' >> ~/.bashrc
 echo 'export PATH="/usr/local/opt/gnu-getopt/bin:$PATH"' >> ~/.bashrc
 echo 'export PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH"' >> ~/.bashrc
 echo 'export PATH="/usr/local/opt/grep/libexec/gnubin:$PATH"' >> ~/.bashrc
 echo 'export PATH="/usr/local/opt/gnu-sed/libexec/gnubin:$PATH"' >> ~/.bashrc
+```
 
 4.重新加载一下 shell 启动文件
+```bash
 source ~/.bashrc
+```
 
 然后就可以和 Linux 一样正常编译了