Fix TUI validation reason

Small change, but with humanize_validation_result introduction, it was used there incorrectly causing double quoting

Going from this:

To this:

clive/__private/ui/widgets/inputs/clive_validated_input.py

@@ -91,6 +91,10 @@ class CliveValidatedInput(CliveWidget, Generic[InputReturnT], AbstractClassMessa
 
         Vertical {
             height: auto;
+
+            Pretty {
+                margin: 0 1;
+            }
         }
     }
     """
@@ -317,5 +321,5 @@ class CliveValidatedInput(CliveWidget, Generic[InputReturnT], AbstractClassMessa
         if validation_result.is_valid:
             self.pretty.display = False
         else:
-            self.query_one(Pretty).update(humanize_validation_result(validation_result))
+            self.query_one(Pretty).update(validation_result.failure_descriptions)
             self.pretty.display = True