Change build to use python 3, minor lint fixes

Change-Id: I3a07c58efb8b676f77426a6ff8cb3e40f13d3f1f
diff --git a/Makefile b/Makefile
index 4d57f91..724d01c 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@
 
 # Create the virtualenv with all the tools installed
 doc_venv:
-	virtualenv doc_venv ;\
+	virtualenv -p python3 doc_venv ;\
 	source ./doc_venv/bin/activate ;\
 	pip install livereload ;\
 	pip install -r requirements.txt
diff --git a/configuration/multicast.rst b/configuration/multicast.rst
index 63fd4c9..a33fe3c 100644
--- a/configuration/multicast.rst
+++ b/configuration/multicast.rst
@@ -199,7 +199,7 @@
 
   .. code-block:: console
 
-      $ curl --user onos:rocks -X DELETE -H 'Accept: application/json' 'http://<controller-ip>:8181/onos/mcast/mcast
+      $ curl --user onos:rocks -X DELETE -H 'Accept: application/json' 'http://<controller-ip>:8181/onos/mcast/mcast'
 
 - Bulk route removal
 
diff --git a/installation.rst b/installation.rst
index 2ebea50..c1502a1 100644
--- a/installation.rst
+++ b/installation.rst
@@ -342,7 +342,7 @@
 
 - To **stop** OF-DPA and OpenFlow agent, run:
 
-  .. code-block:: consol
+  .. code-block:: console
 
      # killall ofagentapp