update: Example exchanged for outputting folder structure.

documentation-guidelines.md

@@ -37,15 +37,15 @@ drawio -x -f png -b 10 -o <output>.png <file>.drawio
 If you want to add an optional folder structure to your documentation, you can use the following command to generate a tree-like structure.
 
 ```bash
-ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/   /' -e 's/-/|/'     
+find . -type d ! -path '*/.*' | sed -e "s/[^-][^\/]*\// |/g" -e "s/|\([^ ]\)/|-\1/"
 ```
 
 Example output:
 
 ```text
-   |-know-how
  |-resources
-   |---diagrams
-   |---images
-   |---scripts
+ | |-images
+ | |-diagrams
+ | |-scripts
+ |-know-how
 ```