fix sed

tips.md

@@ -6,7 +6,7 @@ sudo apt install zsh
 chsh -s /bin/zsh
 sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
 git clone https://github.com/zsh-users/zsh-autosuggestions.git ~/.oh-my-zsh/custom/plugins/zsh-autosuggestions
-sed -i '/^plugins=/c\plugins=(git\n        zsh-autosuggestions\n        )' ~/.zshrc
+sed -i '/^plugins=(/{:a;N;/)/!ba;s/^plugins=(.*\n)*.*)/plugins=(\n  git\n)/}' ~/.zshrc
 # if fzf installed through apt is > 0.48
 # sudo apt install fzf
 # if fzf installed through apt is < 0.48