Minor changes

source/_docs/installation/armbian.markdown

@@ -13,7 +13,7 @@ footer: true
 
 Python 3.5.3 or later is required.
 
-Setup Python and `pip`
+Setup Python and `pip`:
 
 ```bash
 $ sudo apt-get update
@@ -23,10 +23,12 @@ $ sudo apt-get install python3-dev python3-pip
 Now that you installed python, there are two ways to install Home Assistant:
 1. It is recommended to install Home Assistant in a virtual environment to avoid using `root`, using the [VirtualEnv instructions](/docs/installation/virtualenv/)
 2. Alternatively, you can install Home Assistant for the user you created when first booting Armbian:
+
 ```bash
 $ sudo pip3 install homeassistant
 $ hass --open-ui
 ```
+
 Running these commands will:
 
  - Install Home Assistant

source/_docs/installation/centos.markdown

@@ -20,6 +20,7 @@ First of all install the software collection repository as root. For example, on
 ```bash
 $ yum install centos-release-scl
 ```
+
 Install some dependencies you'll need later.
 
 ```bash

source/_docs/installation/fedora.markdown

@@ -23,14 +23,14 @@ and Home Assistant itself.
 $ pip3 install homeassistant
 ```
 
-To isolate the Home Assistant installation a [venv](https://docs.python.org/3/library/venv.html) is handy. First create a new directory to store the installation and adjust the permissions.
+To isolate the Home Assistant installation a [`venv`](https://docs.python.org/3/library/venv.html) is handy. First create a new directory to store the installation and adjust the permissions.
 
 ```bash
 $ sudo mkdir -p /opt/homeassistant
 $ sudo useradd -rm homeassistant -G dialout
 $ sudo chown -R homeassistant:homeassistant /opt/homeassistant
 ```
-Now switch to the new directory, setup the venv, and activate it.
+Now switch to the new directory, setup the `venv`, and activate it.
 
 ```bash
 $ sudo -u homeassistant -H -s