Merge pull request #1051 from JoKeyser/fix-a-missing-dollar-sign

Add a missing $ in bash listing

episodes/04-changes.md

@@ -586,7 +586,7 @@ Two important facts you should know about directories in Git.
   you can add all files in the directory at once by:
 
   ```bash
-  git add <directory-with-files>
+  $ git add <directory-with-files>
   ```
 
   Try it for yourself: