Update CONTRIBUTING.rst

CONTRIBUTING.rst

@@ -3,30 +3,25 @@ Add features to ej-server
 
 For each issue to be solved, follow the procedure below:
 
--  In case of your development environment isn't already built, then clone the
-repository, follow the installation guide at `README.rst`_ and install the
-hooks to check your static code with:
+-  In case of your development environment isn't already built, then clone the repository, follow the installation guide at `README.rst`_ and install the hooks to check your static code with::
 
-   $ inv install-hooks
+    $ inv install-hooks
 
--  Checkout to branch ``dev`` or any other branch you may want to create to
-solve your issue. E.g.:
+-  Checkout to branch ``dev`` or any other branch you may want to create to solve your issue. E.g.::
 
    $ git checkout dev
 
 -  Always run the tests before a commit you do otherwise your pull request
-will not be merged !
+will not be merged! E.g.::
 
    $ inv test
 
--  At the end of your issue, open a pull request to branch MASTER:
+-  At the end of your issue, open a pull request to branch MASTER::
 
    ejplatform/ej-server/master <- ejplatform/ej-server/dev
 
--  Wait until Travis CI, GitLab CI and Code Climate runs all the integration
-tests.
+-  Wait until Travis CI, GitLab CI and Code Climate runs all the integration tests.
 -  If all the tests passed any contributor can merge your PR.  :rocket:
--  If you create a branch different from ``dev``, than always delete it after
-your PR be merged.
+-  If you create a branch different from ``dev``, than always delete it after your PR be merged.
 
 .. _README.rst: README.rst