Fixes emphasis in 2016 README

Author: romellem

2016/17/README.md

@@ -29,9 +29,9 @@ To access the vault, all you need to do is reach the bottom-right room; reaching
 
 For example, suppose the passcode is `hijkl`. Initially, you have taken no steps, and so your path is empty: you simply find the MD5 hash of `hijkl` alone. The first four characters of this hash are `ced9`, which indicate that up is open (`c`), down is open (`e`), left is open (`d`), and right is closed and locked (`9`). Because you start in the top-left corner, there are no "up" or "left" doors to be open, so your only choice is _down_.
 
-Next, having gone only one step (down, or `D`), you find the hash of `hijkl_D_`. This produces `f2bc`, which indicates that you can go back up, left (but that's a wall), or right. Going right means hashing `hijkl_DR_` to get `5745` - all doors closed and locked. However, going _up_ instead is worthwhile: even though it returns you to the room you started in, your path would then be `DU`, opening a _different set of doors_.
+Next, having gone only one step (down, or `D`), you find the hash of <code>hijkl<em>D</em></code>. This produces `f2bc`, which indicates that you can go back up, left (but that's a wall), or right. Going right means hashing <code>hijkl<em>DR</em></code> to get `5745` - all doors closed and locked. However, going _up_ instead is worthwhile: even though it returns you to the room you started in, your path would then be `DU`, opening a _different set of doors_.
 
-After going `DU` (and then hashing `hijkl_DU_` to get `528e`), only the right door is open; after going `DUR`, all doors lock. (Fortunately, your actual passcode is not `hijkl`).
+After going `DU` (and then hashing <code>hijkl<em>DU</em></code> to get `528e`), only the right door is open; after going `DUR`, all doors lock. (Fortunately, your actual passcode is not `hijkl`).
 
 Passcodes actually used by Easter Bunny Vault Security do allow access to the vault if you know the right path. For example: