update rebase pres

2019/2019-09-09_testCourseAdv/slides/rebasePresentation.md

@@ -5,7 +5,12 @@
 $ echo "# message" > yourName.md
 ```
 
-* Then create a file in the develop branch:
+* Then create a file in the develop branch
 ```bash
 $ touch startRebase.txt
-```
\ No newline at end of file
+```
+
+* Check the histories of both branches
+```bash
+$ git log
+```