\DOC isspace

\TYPE {isspace : string -> bool}

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

\DESCRIBE
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
Fails if the string is empty.

\SEEALSO
isalnum, isalpha, isbra, isnum, issep, issymb.

\ENDDOC