Fix a category.
Fix a category.

fscheck/FsCheck,cloudRoutine/FsCheck,paulyoung/FsCheck,fscheck/FsCheck,forki/FsCheck,ploeh/FsCheck,forki/FsCheck,cloudRoutine/FsCheck,sideeffffect/FsCheck,paulyoung/FsCheck,ErikSchierboom/FsCheck,fsharp/FsCheck,jhamm/FsCheck