Accepts a numeric stream and outputs and outputs ASCII characters. Options arguments provide for forced-length messages.
spell takes two optional arguments. The first is a minimum output size. The second is the UTF-8 number of a fill character to put between words and at the end of a word if it is less than the minimum output. The default minimum is 0 (none), and the default fill character is space (32), to use 0 as a fill character, supply a negative number as a second argument.
Sets the minimum output size. Any input that doesn't "spell" to the minimum length is followed by enough fill characters (the default is the space character, 32 in ASCII) to satisfy the minimum requirement.
Specifies the fill character to use instead of 32. If you want to use '0' as a fill character, use any negative number as a second argument to spell.
Common Box Attributes
The ASCII representation of the input is sent out one character at a time.