minor addition

readme.md

@@ -4,6 +4,8 @@ This is a plain markdown file containing a few lines
 of text. It is part of a project guiding you through your
 first few steps with the version control system Git.
 
+Git is very cool, and very hlepful!
+
 ## Reference
 
 - https://missing.csail.mit.edu/2020/version-control/