Mostly docs cleanups

Fix documentation build errors and RST formatting

Change-Id: Id93153400c5b069dd9d772381558c7085f64c207
diff --git a/tools/build_venv.sh b/tools/build_venv.sh
index 11d1d35..cfa39a8 100755
--- a/tools/build_venv.sh
+++ b/tools/build_venv.sh
@@ -4,11 +4,12 @@
 #
 # build_venv.sh venv-path [package [...]]
 #
+# Installs basic common prereq packages that require compilation
+# to allow quick copying of resulting venv as a baseline
+#
 # Assumes:
 # - a useful pip is installed
 # - virtualenv will be installed by pip
-# - installs basic common prereq packages that require compilation
-#   to allow quick copying of resulting venv as a baseline
 
 
 VENV_DEST=${1:-.venv}
@@ -16,14 +17,14 @@
 
 MORE_PACKAGES="$@"
 
-# If TOP_DIR is set we're being sourced rather than running stand-alone
+# If ``TOP_DIR`` is set we're being sourced rather than running stand-alone
 # or in a sub-shell
 if [[ -z "$TOP_DIR" ]]; then
 
     set -o errexit
     set -o nounset
 
-    # Keep track of the devstack directory
+    # Keep track of the DevStack directory
     TOP_DIR=$(cd $(dirname "$0")/.. && pwd)
     FILES=$TOP_DIR/files