This will pick up the category description and make it available to the output of the module.
No effect on backwards compatibility, as it doesn't change what exists now, merely adds one more attribute.
Use Case: When you're choosing to output subcategories, it might be useful in some cases to have more than just the category name available. Output templates that don't need it can ignore it safely, but this makes it available for the templates that might want to use it.
I have a site which provided me with an error 500 code. On looking in the server logs it pointed to an extra ) on row 33 which is now on row 34 in the staging version.
Testing:
Code Review
Check it still shows correctly.
* Group by subcategories on mod_weblinks
* BUGFIX: added missing 1-column option.
* GroupBySubcategories turned Off by default.
* Improved readability of inline php statements.