update absolute vs relative path schematic

docs/02-the-filesystem.md

@@ -266,34 +266,29 @@ Over time, it will become easier for you to keep a mental note of the
 structure of the directories that you are using and how to quickly
 navigate amongst them.
 
-::::::::::::::::::::::::::::::::::::::: challenge
 
-## Relative path resolution
 
-Using the filesystem diagram below, if `pwd` displays `/Users/thing`,
-what will `ls ../backup` display?
+## Relative path resolution
 
-1. `../backup: No such file or directory`
-2. `2012-12-01 2013-01-08 2013-01-27`
-3. `2012-12-01/ 2013-01-08/ 2013-01-27/`
-4. `original pnas_final pnas_sub`
+!!! dumbbell "Using the filesystem diagram below, if `pwd` displays `/Users/thing`," what will `ls ../backup` display?"
 
-![](fig/filesystem-challenge.svg){alt='File System for Challenge Questions'}
+    1. `../backup: No such file or directory`
+    2. `2012-12-01 2013-01-08 2013-01-27`
+    3. `2012-12-01/ 2013-01-08/ 2013-01-27/`
+    4. `original pnas_final pnas_sub`
 
-::::::::::::::: solution
+    ![](fig/filesystem-challenge.svg){alt='File System for Challenge Questions'}
 
-## Solution
 
-1. No: there _is_ a directory `backup` in `/Users`.
-2. No: this is the content of `Users/thing/backup`,
-   but with `..` we asked for one level further up.
-3. No: see previous explanation.
-   Also, we did not specify `-F` to display `/` at the end of the directory names.
-4. Yes: `../backup` refers to `/Users/backup`.
+    ??? success "Solution"
 
-:::::::::::::::::::::::::
+        1. No: there _is_ a directory `backup` in `/Users`.
+        2. No: this is the content of `Users/thing/backup`,
+           but with `..` we asked for one level further up.
+        3. No: see previous explanation.
+           Also, we did not specify `-F` to display `/` at the end of the directory names.
+        4. Yes: `../backup` refers to `/Users/backup`.
 
-::::::::::::::::::::::::::::::::::::::::::::::::::
 
 ### Navigational Shortcuts