Fix up markdown formatting in markdown (Closes #28)

Author: yarikoptic

src/computing/kerberos.md

@@ -4,20 +4,19 @@
 1. modify ~/.ssh/config to have a section like:
 
         Host discovery7.hpcc.dartmouth.edu discovery7
-	  User <netid>
+	      User <netid>
           GSSAPIAuthentication yes
           GSSAPIDelegateCredentials yes
 
 2. install kerberos client utilities.
 
-On Debian: `sudo apt-get install krb5-user`
-
-On MacOS with [Homebrew](https://brew.sh/): `brew install krb5`
+     - On Debian: `sudo apt-get install krb5-user`
+     - On MacOS with [Homebrew](https://brew.sh/): `brew install krb5`
 
 3. initialize your kerberos token
 
         kinit <NETID>@KIEWIT.DARTMOUTH.EDU
-        
+
 where `<NETID>` is your Dartmouth NetID (like `d11191d`).  Use `klist` command to see if there is an active token.
 As you will see from `klist` output, that token has expiration date, which is 10 hours from the moment you `kinit`ed it. 
 You could use `kinit -R` (or just ssh again) to refresh the ticket.