Add note about GitHub trick for multiple commits

Author: hturner

office_hours/2023-12-14.md renamed to office_hours/2023-12-14_EMEA-APAC.md

@@ -61,10 +61,14 @@ Something we could do or discuss together today: Cherry trees data
 
     - Click on the commit id
 
-    - Add '.diff' to the end of the URL
+    - Add '.diff' to the end of the URL 
 
     - Save the resulting file as a .diff text file
+ 
+POST EDIT: The above trick only works for single commits. To get a diff for multiple commits, either:
 
+ - Create a PR back to the r-svn mirror, then add '.diff' to the PR URL
+ - Compare branches: from fork of repo, where it says "This branch is 2 commits ahead of ...", click on "2 commits ahead", then add '.diff' to the compare URL