Fixed formatting.

Author: michaellwest

installation/README.md

@@ -22,11 +22,11 @@ Working with Docker is going to be the preferred method of installation.
 
 You can find two flavors of the images:
 * [Community Built](https://hub.docker.com/r/sitecorepowershell/sitecore-powershell-extensions)
- * Ex: `docker pull sitecorepowershell/sitecore-powershell-extensions:6.4-1809`
+  * Ex: `docker pull sitecorepowershell/sitecore-powershell-extensions:6.4-1809`
 * Sitecore Built
- * Ex: `docker pull scr.sitecore.com/sxp/modules/sitecore-spe-assets:6.4-1809`
+  * Ex: `docker pull scr.sitecore.com/sxp/modules/sitecore-spe-assets:6.4-1809`
 
-With this approach you essentialy add a new layer during your image build to include the files from the asset image. Here are some samples of what you can add to your existing setup. Check out Sitecore's samples additional guidence.
+With this approach you essentialy add a new layer during your image build to include the files from the asset image. Here are some samples of what you can add to your existing setup. Check out Sitecore's samples for additional guidence.
 
 **docker-compose.yml**