Fix markdown issue

Markdown is tested on Dillinger.io and the interpreter is not exactly
the same as the one on Github, so I fix the Markdown to be more
readable.

docs/setup/installation.md

@@ -4,8 +4,7 @@ This guide will detail how to install Cachet on your server.
 
 ## Download the source code with Git
 
-> **Check out the latest version!**
-> 
+> **Check out the latest version!**  
 > The tags below are examples of what will be shown.
 > You should always run git checkout on the latest tag.
 
@@ -35,14 +34,12 @@ file to `.env` regardless of what environment you're working on.
 
 It's now just a case of editing this new .env file and setting the values of your setup.
 
-> **Environment Configuration Notice**
->
+> **Environment Configuration Notice**  
 > Any values with spaces in them should be contained within double quotes.
 
 The `.env` file set environment variables that will be used by the application.
 
-> **SQLite hosts**
->
+> **SQLite hosts**  
 > If you're using SQLite then your .env file should not contain a
 > `DB_HOST` key. You'll also need to touch ./database/database.sqlite
 > and give it the required permissions.
@@ -61,8 +58,7 @@ composer install --no-dev -o
 If you are installing Cachet as a contributor, you can forget the `--no-dev`
 option.
 
-> **Tip for Windows users**
->
+> **Tip for Windows users**  
 > If you're stuck at the Composer stage, you can run
 > `composer install --no-dev -o --no-scripts`
 > which usually fixes any issues on Windows servers.
@@ -81,8 +77,7 @@ php artisan app:install
 > Never change the `APP_KEY` after installation on production environment.
 > This will result in all of your encrypted/hashed data being lost.
 
-> **Getting a 500 - Internal Server Error?**
->
+> **Getting a 500 - Internal Server Error?**  
 > If you get a 500 error when visiting your status page, you may need to
 > run `chmod -R 777 storage/` for it to work or `rm -rf bootstrap/cache/*`
 
@@ -90,8 +85,7 @@ You can also try to give permissions to cache chmod -R 777 bootstrap/
 
 ## Running Cachet on Apache
 
-> **Required Apache Modules**
->
+> **Required Apache Modules**  
 > You need to enable `mod_rewrite` for Apache. On Debian-based systems you can do this by
 >
 > `sudo a2enmod rewrite`