Ken Dickey has fixed the following problems with the reference implementation
for this SRFI.  This changes are reflected in an updated version of the document.

The changes are:
    [1] "~h" now prints the appropriate header line in the documentation string.
    [2] "~w,dF" now rounds appropriately
        e.g: (format "~8,2F" 3.4567e11) --> " 3.46e11", not "4.45e11"
    [3] Format now reports an error if there are too few arguments
        e.g. for (format "~a")

David