Changes

: To create a new branch: <code> hg branch ws</code>

: Then commit it: <code> hg ci -m 'added branch ws'</code>

: Then merge with the revision of the branch you want to merge with: <code> hg merge -r 3 </code>

: Don't forget to commit this merge!

==Challenges==

* 1- First challenge is how to trim history of a repository.