FIX: wrong keyword used in example items.lisp
There is a small typo in one of the examples. :document-type
instead of :concrete-type
is causing an error when trying to go through this example. This pr contains the fix.
There is a small typo in one of the examples. :document-type
instead of :concrete-type
is causing an error when trying to go through this example. This pr contains the fix.