Update tutorial.md

Author: BHFock

docs/tutorial.md

@@ -394,6 +394,8 @@ Stash saves those changes aside, and unstash brings them back later.
 git cl stash <changelist-name>
 ```
 
+Tip: Run stash commands from your repository root to avoid directory issues.
+
 - Saves all unstaged and untracked files from the changelist.
 - Staged files are left alone (so you can commit them separately).
 - The stash is named after your changelist and timestamped.