Update pull-upstream.md

pull-upstream.md

@@ -13,7 +13,7 @@ To integrate all the contributions made to the original repository into your loc
 
 3. **Terminal**: type the command to pull the original repository and branch you wish to obtain locally which has the format: `git pull [email protected]:ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git` where you would replace original owner and repository to the appropriate names. Here: 
    ```
-   git pull [email protected]:lmu-osc/Collaborative-RStudio-GitHub.git
+   `git pull [email protected]:lmu-osc/Collaborative-RStudio-GitHub.git`
    ```
 
     ![](./assets/command-line.png)