Update cheat-sheet.md

cheat-sheet.md

@@ -3,7 +3,8 @@
 To avoid entering username and password everytime you pull/push to a git repository, there are two known ways.
 * Add your SSH public key to the remote end (this is possible with either github, gitlab or a private remote server)
 * Setup your `~/.gitconfig` like:
-  ```
+
+  ```bash
   # This is Git's per-user configuration file.
   [user]
         name = vihari
@@ -11,6 +12,7 @@ To avoid entering username and password everytime you pull/push to a git reposit
   [credential]
         helper = osxkeychain
   ```
+  
   The `osxkeychain` works only on Mac and I use `/usr/share/doc/git/contrib/credential/gnome-keyring/git-credential-gnome-keyring` on Linux.
   For more: [refer](http://blog.iqandreas.com/git/storing-https-authentication-in-ubuntu-and-arch-linux/)