isspace : string -> bool

SYNOPSIS
Tests if a one-character string is some kind of space.

DESCRIPTION
The call isspace s tests whether the first character of string s (normally it is the only character) is a `space' of some kind, including tab and newline.

FAILURE CONDITIONS
Fails if the string is empty.

SEE ALSO
isalnum, isalpha, isbra, isnum, issep, issymb.