improve readme

README.md

@@ -162,11 +162,13 @@ git checkout dev
 ```
 git add .
 #Adds the file to your local repository and stages it for commit.
+```
 
 ```
 git commit -m "your comment for this commit"
 #Commits the tracked changes and prepares them to be pushed to a remote repository.
 ```
+
 ```
 git push origin dev
 #Pushes the changes in your local repository up to the remote repository you specified as the origin