EVALUATE-TASK-INPUT-FUNCTION now uses CONTAINS-TASK-P to ascertain the task object to pass to the task input function.
Added test EVALUATE-TASK-INPUT-FUNCTION/MANY that contains more than one of exactly the same class.
Function PREPARE-GROUP-CHAINS-SORT-TEST now produces a more useful error message when the function generated for :CLASSES forms is unable to perform its job.
Changed operation in EXECUTION-TASK-3 to use a string if the OPERATION-PLIST contains no value for the key :TEXT. This avoids issues with *PRINT-CASE*.