Merge pull request #461 from gadgil48/gadgil48/439-empty-callout

Fixed the formatting for the Keeping Main Branch Stable empty callout

Author: bielsnohr

episodes/14-collaboration-using-git.md

@@ -624,12 +624,10 @@ which is often the source branch for website projects hosted on GitHub
 
 ::::::::::::::::::::::::::::::::::::::::::::::::::
 
-:::::::::::::::::::::::::::::::::::::  testimonial
+:::::::::::::::::::::::::::::::::::::::::  callout
 
 ## Keeping Main Branch Stable
 
-::::::::::::::::::::::::::::::::::::::::::::::::::
-
 Good software development practice is to keep the `main` branch stable
 while you and the team develop and test new functionalities on feature branches
 (which can be done in parallel and independently by different team members).
@@ -639,7 +637,7 @@ work well with the rest of the code (and not just in isolation).
 We talk more about different types of code testing in one of the following episodes.
 
 
-
+::::::::::::::::::::::::::::::::::::::::::::::::::
 
 :::::::::::::::::::::::::::::::::::::::: keypoints