Merge "Add information on tox usage"

diff --combined docs/guides/onap-developer/how-to-use-docs/include-documentation.rst
index 6f5b0d4,97a9d73..af46d64
--- 1/docs/guides/onap-developer/how-to-use-docs/include-documentation.rst
--- 2/docs/guides/onap-developer/how-to-use-docs/include-documentation.rst
+++ b/docs/guides/onap-developer/how-to-use-docs/include-documentation.rst
@@@ -51,10 -51,7 +51,10 @@@ login to gerrit or for git clone reques
  The next step is to add a directory in the doc project where your
  project will be included as a submodule and at least one reference
  from the doc project to the documentation index in your repository.
 -The following sequence will do this over ssh.
 +The following sequence will do this over ssh. Please note that the
 +reference to your project in *repolist.rst* should be considered
 +temporary and removed when you reference it from more appropriate
 +place.
  
  .. caution::
  
@@@ -497,12 -494,11 +497,11 @@@ All Documentatio
  -----------------
  To build the all documentation under doc/, follow these steps:
  
- Install virtual environment.
+ Install `tox <https://pypi.org/project/tox>`_.
  
  .. code-block:: bash
  
-    sudo pip install virtualenv
-    cd /local/repo/path/to/project
+    sudo pip install tox
  
  Download the DOC repository.