[ 原始碼： spell ]
套件：spell（1.1-2~bpo11+1）
GNU Spell, a clone of Unix `spell'
GNU Spell is a spelling checking program which prints each misspelled word on a line of its own. It is designed as a clone of the standard Unix `spell' program, and implemented as a wrapper for Ispell.
Spell accepts as its arguments a list of files to read from. Within that list, the magical file name `-' causes Spell to read from standard input. In addition, when called with no file name arguments, Spell assumes that it should process standard input.