Add information on virtualenv usage

This patch also adds link to Python Package Index (like for doc8
package), drops no longer necessary privilege elevation and fixes minor
spacing issues.

Issue-ID: DOC-502
Change-Id: I55a583bf05a731371008d9cfb55cbfa2e2ad3a77
Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>

1 files changed, 14 insertions, 4 deletions

diff --git a/docs/guides/onap-developer/how-to-use-docs/include-documentation.rst b/docs/guides/onap-developer/how-to-use-docs/include-documentation.rst
index 6909cceb1..d61cb9cff 100644
--- a/docs/guides/onap-developer/how-to-use-docs/include-documentation.rst
+++ b/docs/guides/onap-developer/how-to-use-docs/include-documentation.rst
@@ -427,17 +427,27 @@ One Project
 -----------
 To test how the documentation renders in HTML, follow these steps:
 
-Install virtual environment.
+Install `virtual environment <https://pypi.org/project/virtualenv>`_ & create one.
 
 .. code-block:: bash
 
    sudo pip install virtualenv
+   virtualenv onap_docs
+
+Activate `onap_docs` virtual environment.
+
+.. code-block:: bash
+
+   source onap_docs/bin/activate
+
+.. note:: Virtual environment activation has to be performed before attempting to build documentation.
+          Otherwise, tools necessary for the process might not be available.
 
 Download a project repository.
 
 .. code-block:: bash
 
-  git clone http://gerrit.onap.org/r/<project>
+   git clone http://gerrit.onap.org/r/<project>
 
 Download the doc repository.
 
@@ -450,7 +460,7 @@ Change directory to doc & install requirements.
 .. code-block:: bash
 
    cd doc
-   sudo pip install -r etc/requirements.txt
+   pip install -r etc/requirements.txt
 
 Copy the conf.py file to your project folder where RST files have been kept:
 
@@ -476,7 +486,7 @@ specified output folder directory.
 You can use your Web Browser to open
 and check resulting html pages in the output folder.
 
-.. note:: Be sure to remove the `conf.py`, the static/ files and the output folder from the `<project>/docs/`.This is for testing only. Only commit the rst files and related content.
+.. note:: Be sure to remove the `conf.py`, the static/ files and the output folder from the `<project>/docs/`. This is for testing only. Only commit the rst files and related content.
 
 .. _building-all-documentation: