Merge pull request #92 from datacarpentry/formatting-fixes

more formatting fixes

_episodes/03-verifying-instance.md

@@ -283,7 +283,7 @@ You can end sessions:
 
 By default `tmux` is not installed in most cloud Linux instances. However when you start a new instance, you can install new software packages using Package Managers like YUM (for Red Hat and Centos instances) or APT (for Debian or Ubuntu instances). 
 
-## Caution
+> ## Caution
 > In this lesson, you are using an Amazon instance owned by someone else, so you *won't* be able to install packages, but 
 > we'll show you how to use APT (Advanced Package Tool) to find packages, so you know how to do it when you launch your own
 > instance. 
@@ -305,7 +305,7 @@ $
 
 On our system, searching for tmux only gives one result, and it is already installed. 
 
-## Exercise
+> ## Exercise
 > Check to see whether APT can be used to install your favorite bioinformatics program, or ones you commonly see used in your 
 > field. If you can't think of anything, try to search for BLAST. What do you have to search for to get back the results you'd 
 > expect? 
@@ -322,14 +322,14 @@ tmux/trusty,now 1.8-5 amd64 [installed]
 
 which means that it is stored in APT as tmux.
 
-## Exercise
+> ## Exercise
 > What are the package names for programs you need in your pipeline? Are they the same as the program name? What package name 
 > would you need to install the old version of BLAST? 
 {: .challenge}
 
 Once you know the package name, you could install it using `apt install`:
 
-## Reminder
+> ## Reminder
 > Remember, the following instructions are for demonstration only, you don't have the administrator password needed to run 
 > these commands on your workshop instance. 
 {: .callout}